Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a07633fe5801b9b…

MALICIOUS

PDF

128.2 KB Created: 2021-05-06 02:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0cde6bba62756cc1bc647ab1a214cde SHA-1: c0d9d7d03d1aa3edfdd9677cafedae7494ed2eff SHA-256: 2a07633fe5801b9b234225b6b26370d19325c84f068a53787300163c1a7f5727
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URLs, with several pointing to disposable hosting and acting as link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure strongly suggest this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://golowaki.ru/strik?utm_term=what+is+post+colonial+discourse PDF link annotation
    • https://jenamojid.weebly.com/uploads/1/3/1/0/131070605/f3ae57f4c51b6.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/xewevogomitifuguli.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/dejgjdz/technical_report_writing_tips.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/zaridedik_tuzaju_futaduxajagodib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486368/normal_602712858d561.pdfIn PDF document text
    • http://blu-ital.space/44477425868xu5z6.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/71086956993.pdfIn PDF document text
    • http://it50disconto.pro/what_is_cancer_caused_by_brainlyojcvp.pdfIn PDF document text
    • http://flylovel.com/fotogokode545yr.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/E2cMkgf/sticker_studio_sticker_maker_for_whatsapp_apk.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/vupemekobakekofukumox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_60247d4a9a84b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_60627d54a7e77.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/fupanabivote/creche_business_plan_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/audi_r8_performance_v10.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/27290217073.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/numbers_in_english_1_100.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A805 5056 bytes
SHA-256: 5c1274dc30bde9731e99de5310d186fb9be4c8ca70167055c73a3d0f12089af6
font_01_sfnt_off0001b926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B926 14692 bytes
SHA-256: b9eff92c6f73d3905ca48d97d9ce1354e7f23bb01a73493a4abd10316016bed9
font_02_sfnt_off0001e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E52D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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