Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d4c80618e72d34…

MALICIOUS

PDF

78.1 KB Created: 2021-04-01 01:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 269da722bbf0eca7d8abf8fa7f0efa8f SHA-1: 494f468823fafd0b1fe6280fdb011570e0377155 SHA-256: 65d4c80618e72d34edb56f00de9be38d8693ed3ae086e10999035735420f1723
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URL points to a site that appears to be part of a lure for insurance policy forms, likely to redirect users to malicious content. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=group+personal+accident+insurance+policy+sbi+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450355/normal_5ff664c8a0253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_6064eb6219e69.pdfIn PDF document text
    • http://tixshopclub.fun/xoramujowuwemosenidabogk7zxp.pdfIn PDF document text
    • http://gnatural.space/chikoo_information_in_marathimowh4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff0d13f291c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_5abfa60efad445e48f1784f58b4850e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/42851380951.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/33404057527.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/89693949665.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_f167de75693e479d8baf435875b8aa1a.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_b5879fe955ef48db90ba71355e671d14.pdf?index=trueIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_b8fc03142c2647bfaa439b44169cbbce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd72b1af-5020-4a0c-ae0d-82ecb13d6cde/how_to_fix_keyboard_not_working_on_acer_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/give_the_rules_for_writing_scientific_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3f0deb-870f-4ce2-9e16-7332fc9e066e/judovelejojaxepovilesox.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_5cc3c2f517324982a4849260bf4d55fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50733f20-a196-486d-91cf-0c7d8012b937/how_much_is_a_case_of_premier_protein_at_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72419ed-d283-40be-a5a6-951367286789/siyahamba_lyrics_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66323fc-711d-46de-bb74-92f16641d467/how_to_season_cast_iron_grill_grates_in_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/telecharger_appcake_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f547942f-a0fd-425b-977b-e3a3c66e3351/procreate_calligraphy_brush_tutorial.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_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 5572 bytes
SHA-256: aabfb6977023a06412ca59fdec7a46b94644d88c4ccbd878d47bc8eb15f0feb6
font_01_sfnt_off000104ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 11068 bytes
SHA-256: 2a47384021968e4eedd689482a5d79ddd9d5d49a2be764fa79d8242ba0ac6fe7

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