Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf8543f5fd3e5f0…

MALICIOUS

PDF

72.3 KB Created: 2021-03-27 15:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5f1d4b35369b71e654215144a7957ab1 SHA-1: d3fb697a2d446a21a67d62d4a3bf17cc0d85f983 SHA-256: cbf8543f5fd3e5f0d74e505a314d7b58f7c84908e617cca87b07a9ee1363b277
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded external links, many of which point to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish users. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=bureau+informatique+chez+ikea.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/123?utm_term=bureau+informatique+chez+ikea PDF link annotation
    • https://cdn.sqhk.co/wakewafo/gdF0FS8/hd_wallpapers_iphone_xs_max.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/QgiheeC/zesuweko.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/Hj3Ruje/celestial_pearl_danio_for_sale_australia.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/jovonuxixe_vabit_lirugiwilopokeb_doravowizefu.pdfIn PDF document text
    • https://pevivifigevesiw.weebly.com/uploads/1/3/5/3/135315965/vugobufe.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/jhapihY/jungle_knife_hit_mod_apk.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/mapalifudug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_248740059e0a4e3b871db3905255c471.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_12153cd0eeb541c49385362c04f7683b.pdf?index=trueIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_f2aa1b3e742c46a69b5f0ed960f46fd7.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_4738cb774e47463b83bd8f0f63cab8bc.pdf?index=trueIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_85d4d5f6763e402d972a01775116b944.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_e6abc0b16dc64493b8ef44f1f465110a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/ssd_performance_vs_hdd.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_b08d110c05a347a39fd55562f0b6ab6f.pdf?index=trueIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_bb333699e15b44c6b35b0dd3be65a703.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_6319bdb80f814f8a8e235377556c7351.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/70087851232.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_757dd01cc1a64715b9d2a6bd4bf4eb91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/passport_application_form_child.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_f5ff2e1193ab49628b6dc2afc86cefd4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/datapadazivedajerutu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5200 bytes
SHA-256: b8ac8641a571076a49a87573327231ec073255f495fe5ea08c38b51fde72ad80
font_01_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 12472 bytes
SHA-256: 96afe94018f1d55b651ad5c146e24a28fdaa62c80ed56128c2205ae584d73801