Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d34aca96656a4c…

MALICIOUS

PDF

106.7 KB Created: 2021-08-02 09:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aabf109b10ec0e701e54c6e33fc4e936 SHA-1: 24b84caab0f02c778ca3c63bdd9ce3224612f357 SHA-256: 34d34aca96656a4c59ef4e44c1a532852eb6a7063d4d59605edc3d784991ace0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with several heuristics flagging them as potentially malicious. Notably, one link points directly to an IP address, and others are hosted on compromised WordPress sites or disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://accessiblevehicleservices.com/userfiles/file/zebevolepitabofatideromil.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a8758b26---87915631164.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/fozag.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/sinefubovamezebolisi.pdfIn PDF document text
    • http://minhanh.com/files/19928213365.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/25194871087.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/soxididojerowosujimon.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/94809011294.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d211fc00689---kagitodalok.pdfIn PDF document text
    • http://desertofohio.net/clients/4/43/43f38f6e2239b09326489e1ba67fa1b6/File/tekosijofalefunogojufa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/fq0j2p3ri0g01g20snvk73u8p0/mirapomilekesajabojapi.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/68o7f1q683m16i1kn3e7ae4n66/56927774293.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7999226c---gusisunoseterefupofu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/27pgd9o20tek4siionsvvd4504/galabalodakavikovona.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/bivopemimajotibijoma.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608efc9e405bb---wuwilovulez.pdfPDF link annotation
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784ae0b990d---nebogezi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956157b0d33---21172869145.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8f65b133e---vesez.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/d4fa24d55e80900b9aba35ecaf174b14/76147459885.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/36627284470.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f2b8f5e6---12122915835.pdfIn PDF document text
    • https://buyafranchise.org/files/files/livewebipirokodotafux.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/dusakibos.pdfIn PDF document text
    • http://ecologie-energie.com/userfiles/file/samut.pdfIn PDF document text
    • https://noddy.nu/images/file/921419011.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/50910331595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+wash+fisher+price+swingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000138e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x138E6 18428 bytes
SHA-256: d9536d663ccecbe62003f54334dc0df9825c0d1cdb270ef67e79c793df8615da
font_00_sfnt_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 10788 bytes
SHA-256: e75fd8749c9df03f419cc12405b92565fb5240f28e9a4ab3ee65482346b09c2e
font_02_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 4040 bytes
SHA-256: 5accd28b93f88256231765d54412dfb73b7c8b89e0db92651776be48329af4d6
font_04_sfnt_off00015700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15700 27952 bytes
SHA-256: 5470f94f83657bec6b59fc491e08b2bede5896d3c0c08cb444400ab073fa64d0

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