Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d0b333db6b906…

MALICIOUS

PDF

78.3 KB Created: 2021-05-02 07:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aa4438752144a8903b096212c8081268 SHA-1: 54584a2057cfa914d8cf930c8dec9a1ef00142ed SHA-256: 7c1d0b333db6b906fd95c361425aa881690fa8f0610211db5f4384e7a77c86fb
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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=eckhart+tolle+the+power+of+now PDF link annotation
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/dipidabigogodi.pdfIn PDF document text
    • https://tazomisoz.weebly.com/uploads/1/3/4/3/134344853/rerabaz-nurafenugaxi.pdfIn PDF document text
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/lunife_kanaratigelipu_lisureke.pdfIn PDF document text
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/40265b53af778e.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hjpm3Cq/54209823605.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/f9d6fd.pdfIn PDF document text
    • https://zifakilis.weebly.com/uploads/1/3/2/3/132302733/8302150.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/2570549450.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/fYDhcja/tesejefeforerevirukofiwel.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/lagaxofut.pdfIn PDF document text
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/3205343.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/fowebedifaxabosixez.pdfIn PDF document text
    • http://pojebanidik.mywebcommunity.org/75733560337.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/LqymKih/best_parental_control_app_for_ipad_screen_time.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/zomovosupopape_baregemavexi_welewaruj_sotonizofiweda.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/idicPia/vukugugagajar.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/S1jhHha/94101707907.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/venoxijobep.pdfIn PDF document text
    • https://lakizixobatit.weebly.com/uploads/1/3/4/3/134325667/7907093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/plate_heat_exchanger_for_outdoor_wood_boiler.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/negative_prefixes_list.pdfIn PDF document text
    • https://a53786a9-8e73-4b2e-9f05-d50c32e9ce72.filesusr.com/ugd/e5a943_129ab3b52c1c4de0a6cec6d8594422cf.pdf?index=trueIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_ed45d0a6859747198c0407f1c3b00b35.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5036 bytes
SHA-256: 6b9753a0bd81a70f35178e1c90d9ba536282edb60969545a46f4bbe3a828ce10
font_01_sfnt_off0001088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 10400 bytes
SHA-256: cd49c79d17497e35fb85d75280085d0efa918a1f3fc5af688353d1c5dc3394f3