Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf039216dab3432b…

MALICIOUS

PDF

77.2 KB Created: 2021-05-05 22:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab06da679d0821c28f22ad60ec02ef56 SHA-1: d5c26b741de1fb3d71b3e0c2a0024773c66e1a27 SHA-256: cf039216dab3432bbeae58c39db6890297183bed5ea0ec0b6e49cd7c6a660a75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=criminal+lawyer+jobs+uk PDF link annotation
    • http://forexgeeks.net/kenavexijudezujovajz.pdfIn PDF document text
    • http://buytoday.cc/46944190399gzyyz.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/698d7db11551.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/10b49d08b7.pdfIn PDF document text
    • http://abistrans.ru/50686483605wdowm.pdfIn PDF document text
    • https://linekepev.weebly.com/uploads/1/3/4/0/134041162/1abcca08fbf.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/hyundai_avante_xd_2020_manual.pdfIn PDF document text
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/kinivatug-zaxox-garitinez-dagefitaxo.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/pepowa.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/4c2133a7.pdfIn PDF document text
    • http://justiciaforjustice.com/sabamh4rlc.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/wojovewusupopugedo.pdfIn PDF document text
    • http://zootime.store/dd_5e_storm_kings_thunder_mapd6n5z.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
    • https://s3.amazonaws.com/tezude/xikurimujikemijipavujafos.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/gotuvigukezimewog.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/zikesatalujojibufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757364f5-7840-48c0-9471-0b63ecc0a9cc/78457773030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d42ad1b-cffc-4ce9-987d-1b3cdc286ba1/college_algebra_final_exam_review_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d78183-36b4-4614-8255-e74679871405/aristotle_nicomachean_ethics_book_10_chapter_6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 5132 bytes
SHA-256: 817437add1fbb1c16414a4a0e4d30717916d4d5767faaff82a36bb12ab639d0b
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 11368 bytes
SHA-256: 18a4bb3dcd659bd85766a756a8a8ce8ab561bebb77048027fd9ac7dfdcf0f707
font_02_sfnt_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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