Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff003a7eedc156f7…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 07:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 78ff3eb1a6cc8712f20dc5dae8b4366d SHA-1: 0859a795b8dbe8405739a3b3cb5f236006160390 SHA-256: ff003a7eedc156f77f16de54824125c95027ea70f137cf47823dc3820b8cafa4
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a URL with 'spider man game download' in the query parameters indicates a lure to entice users into clicking the links. ClamAV and ML classifiers confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://vodnik48.ru/content/file/novikokex.pdf In PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/sabafegobebivap.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160851f7dd3e68---32905881959.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607637423f318---depod.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f512afe78---bilalilirobiduxafoj.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/1fc8004a95857a4a7c098bb4b4c0b08f/malomorenefefig.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210625_002438.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/36858171799.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/59346808454.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce0b03549---tivijoz.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/30456e7d3c5cd97d9054586bd3d00fd2/99100308127.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/21d8f97dc392ef9e3a8d8289be3249d6/33853658896.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/mkk6rnkq30dltldajpfvenon83/wefazedugofadibowujixal.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac03f14ce26---koxanirobosonaredonube.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/94304019298.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072941fc2be7---87495850770.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vvuee2dev7q0s3bog0dldfe0ks/25516229881.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/768a42a4ae550b3961c150e68b0c6bed/jodajopajaxejom.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/9c85c738ccabdc15c48c2f823833b73b/71833831745.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/niderajamunelane.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/sipufaxenax.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/26925273800.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/e1ut6onkfss30ka6i9n3n20a35/wujapimavobibudatasega.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/cvah3v377onir1antocecnpqrg/71598258098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=spider+man+game+download+for+pc+highly+compressedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 11244 bytes
SHA-256: 08e9c7c7661e42eee73419d2db50ee3721b95aca75a059cfb9cdf7b3695c6d88
font_02_sfnt_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 17100 bytes
SHA-256: ea7e93220baff2a04b559ba141218c6a652af0bd8495a8425533995d8cdbfda3

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