Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc2bf9a1db244ad…

MALICIOUS

PDF

74.2 KB Created: 2021-06-13 10:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 278a65bf85afaa21f35930c178c6816b SHA-1: aa1c037462d87b8e39e2494f30d819fddf85a4b2 SHA-256: 3fc2bf9a1db244adf336cc6a2c6cc12421cc16035362c434ea5d4dc95e7f2835
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, 'https://drafthe.ru/pbw?utm_term=technewztop+com+download', suggests a lure for users searching for downloads, likely leading to a phishing site or malware. No scripts were extracted, but the PDF structure and URL patterns indicate a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drafthe.ru/pbw?utm_term=technewztop+com+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448343/normal_6022b48f5de66.pdfIn PDF document text
    • https://perelixaji.weebly.com/uploads/1/3/4/8/134881923/lodixojo-dudomodojoked-femik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fdd71015faa0.pdfIn PDF document text
    • https://navijaxilof.weebly.com/uploads/1/3/2/6/132696044/98dbf087804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_603337cc71a82.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/6044703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380707/normal_5fc69ffe70fcd.pdfIn PDF document text
    • https://xojojesiz.weebly.com/uploads/1/3/4/2/134235357/88f56a3c636c5.pdfIn PDF document text
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/9466431.pdfIn PDF document text
    • https://nudaduxovusupin.weebly.com/uploads/1/3/4/3/134337963/zifubesulowevi_xuwuvegoxesaxe_zedimoma.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/6543981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d232bc4-5fed-47ed-a0ea-1b5f8b275da9/76827361107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813815dd-bd7e-4062-803d-d5dc38084ff4/resident_evil_4_cheats_pc_trainer_1.1.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f2f68e-ea8a-4639-b17e-55d139e56e18/boy_scouts_uk_near_me_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5369f2-6b56-4bf7-90a5-4ff15b8ea939/whirlpool_gold_stove_accubake_system_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c467c7e-9493-44aa-abac-38b31ec069ad/hp_officejet_pro_8600_premium_driver_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a5a4c8-db2d-4d8a-830a-08ba237323a2/fijilonotipu.pdfIn PDF document text
    • http://warikeku.pbworks.com/w/file/fetch/145181805/what_is_postage_for_9x12_envelope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b484c2-c40c-4bd2-8d8f-a817e057ac3a/what_are_the_healthiest_complex_carbohydrates.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/f/cumulative_review_chapters_1-11_geometry_answers.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144596850/como_imprimir_pase_de_abordar_magnicharters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f8860e-6517-440f-bc41-731078bff1bf/how_to_cook_oatmeal_in_a_zojirushi_rice_cooker.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_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5128 bytes
SHA-256: 849e00c124e8f50c47a772b07c497efb462852b3580f13dd6825b013120eccff
font_01_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10520 bytes
SHA-256: 7aafca43dff8ad5f7d9aff137703105afa59d49ed4012ae8749ee18a2e9f4403