Malicious PDF — malware analysis report

Static analysis result for SHA-256 e245ed3f474a9282…

MALICIOUS

PDF

83.5 KB Created: 2021-08-27 22:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c836265a6735cfdd752e577ad33d876a SHA-1: d326f79a33531f2964bdb7b09578ef7c40f4d371 SHA-256: e245ed3f474a92824ebdaceb672753f0241c3d730c13d0f04805d1993440ade7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. It also features a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute phishing content or malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://emeraldcovepartners.com/_data/images/file/febiwo.pdf In PDF document text
    • https://krzczonowice.pl/gfx/file/7831425626.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38dc330d7---16395294017.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/124825711.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/um8gfm99t4bqha7bosmjm9a4g4/58435019287.pdfIn PDF document text
    • https://carlojans.com/cms/file/77161431711.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/sunoxede.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/tarinogina.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/pupizix.pdfIn PDF document text
    • http://vhs1970.com/clients/873287/File/60873374241.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210610135350456013ubssk.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/nedipedufagosabapadajafa.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16091ea6268895---92695311316.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/redofuxa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7ca748068---wowabazexafudisefo.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/67257937242.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/93300308283.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/didopavafurotogabebu.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/noxesupiri.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e598e15f231---71815297468.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/742nibfubap8uqdff7vntl3hd6/jaruke.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/888da476f7e2e542495aef3e40dca4b6/52382015024.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/zovenusimibaf.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/ropunudapajepenaporamunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=list+of+pharmaceutical+companies+in+pakistan+pdf+2019PDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/14388213132.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 17648 bytes
SHA-256: 906246fff783e3d9c40b16411a8ca1e6a4011caafd5a098534e4ec3ad0159207
font_02_sfnt_off000124ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AD 11496 bytes
SHA-256: 87c8820b0a0fd64dd4129254ae0520f3068bc97ac7d00c588f587f17c5d4895c

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