Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0027cc72d2668b…

MALICIOUS

PDF

81.1 KB Created: 2021-05-16 09:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5be3a9ba464fe179be2acf527a3f948 SHA-1: 955df6a27ed275a3b06b3775532715ef8c999deb SHA-256: 7b0027cc72d2668b37806a9314c42310d4f45904bc823a56c8a3720260a88109
126 Risk Score

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 0.9993

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://kuzutuzo.ru/strik?utm_term=can+you+gain+mass+without+weights PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393186/normal_606370a493499.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/el_camino_de_sherlock_libro_completo_gratis.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60200067773.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/hbjfuVY/most_trending_hashtags_on_twitter_today.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/gfhfiI8/felezukopuzazutoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ffdc664340d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_6049cb24ae2fc.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/ohfjbgc/1864589230.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/93011855850.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/armenian_script.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/ehbnWZB/wudanu.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/egjjdOZ/wuzekutozomu.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/zuvinagonadimuvafodew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_6001e1f138bfe.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/geghhgX/uniform_residential_appraisal_report.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/hjhhhc0/69011633544.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/40291321737.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/Bgh0Qif/58076999004.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/tJhdZjc/tennessee_titans_live_game_radio.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/hgJoWji/65049341721.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/dggdkge/lofaginisomizozofobekigut.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/hagcChg/anger_of_stick_100_mod_apk_4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepofif.onlinewebshop.net/70881459371.pdfIn PDF document text
    • http://jofijegisa.atwebpages.com/cours_informatique_algorithme_et_programmation.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/new_born_baby_names_in_marathi_with_meaning.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_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 5072 bytes
SHA-256: 60570974998f4384b812bc3402e04abfccfa77da938784c931e64b1cb618afcb
font_01_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 11032 bytes
SHA-256: d969830f5672ead53b4e67dea91f773e3a900fc49b740a7c0aad0d3d811f86f3