Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07eb2e31c2f10cf…

MALICIOUS

PDF

84.8 KB Created: 2021-03-16 15:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb2aebec0792e57f6baa442c534b8abd SHA-1: da72d044dd289fbf44e7e5235105d44b0e9eb576 SHA-256: d07eb2e31c2f10cf2a8220ca21250df161feb6b30a2fb68e2d4f77005a612c01
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://dugedepap.ru/123?utm_term=proform+treadmill+belt+won%2527+t+move PDF link annotation
    • http://ropisunofo.mygamesonline.org/jarikebapilelorefufa.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/djfNhiO/castle_brom_ramblers_programme.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/hVZ6sgi/mad_gunz_battle_royale_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/fOagjcY/92523913751.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/jiRrgft/wexivakozulawifurarixo.pdfIn PDF document text
    • http://raicen.com/peter_and_wendy_movie_watch_onlinemhd9x.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/SljjdCe/cubase_5_free_download_full.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/gezuwozilevowetizegsg37.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/muzilovotavu.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/logitech_f710_driver_download.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/fibupol.pdfIn PDF document text
    • http://meblik.su/kamulomabomotawujofibmc1w.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/IXmtjbD/50107308880.pdfIn PDF document text
    • http://ndfnasg.xyz/letter_of_credit_example_quoragi71q.pdfIn PDF document text
    • http://itnegozio.info/which_book_is_best_for_ethics_integrity_and_aptitude_for_upsc91rb7.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Q3ieigK/50453859309.pdfIn PDF document text
    • https://cdn.sqhk.co/maxabamed/ekwgfgN/jiwisisujidetixebawus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/zoxagawefopirevifetogulo.pdfIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_9ffedbf3ee684214ad247c00c3fcf1d3.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_395124d5c6d54bcfa817c649938bc9ca.pdf?index=trueIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/bubozabawiwuzol.pdfIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_9d9a8964c6844990b70c95ccad0384fe.pdf?index=trueIn PDF document text
    • http://xanedemu.onlinewebshop.net/thromboangiitis_obliterans.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 4992 bytes
SHA-256: 727f82361d4ef1145f8742b296c64838b5ac8fe7a3427b442bb5eed669135f59
font_01_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 10744 bytes
SHA-256: 079ebba7cf387ffc1bb24f5eafae5dcfec4bac139334e4b96d656d9b8460f287
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 16332 bytes
SHA-256: e6bf1aaab92b5936b8242491841ec91c42c187327ef2396d11e61959e538e1c1
font_03_sfnt_off000136be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176