Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf097636d29f85a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-31 19:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: efcc449cc0ef4983f508e1e49e4af0c9 SHA-1: d8a47e00fa95040087cb313c2f73d515764bfe45 SHA-256: 6cf097636d29f85ab67688ae6b3aceca5bd93112f1b843a3a5a6346981705fc5
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 0.9997

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://crophysi.ru/123?utm_term=pro+forma+financial+statements+after+acquisition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388596/normal_604d449a55595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_6035172e8655e.pdfIn PDF document text
    • https://cdn.sqhk.co/fagijopi/yjiaUif/gacha_life_characters_boy_and_girl.pdfIn PDF document text
    • http://forexgeeks.net/resumen_de_el_cuento_la_siesta_del_martesfj4jz.pdfIn PDF document text
    • http://pitushok.fun/xapilopirobxrjz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_60223c602560d.pdfIn PDF document text
    • http://docita.fun/wirimiramikizotadexagaziyze2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_6032d1c757d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408719/normal_5ffac6a027167.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/jgF2IwD/slackline_obstacle_course_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_6048108897cf3.pdfIn PDF document text
    • http://tegokujili.iblogger.org/basic_calligraphy_fonts.pdfIn PDF document text
    • http://lovechat24.club/sap_hana_amdp_tutorialqlm95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5ffa287c61cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444096/normal_5ff771506bcb5.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/HdpEPia/html_radio_player_code_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_602ecf3c0475f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_5fc8b3e6e9bd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fawixixajij.rf.gd/15263314758.pdfIn PDF document text
    • http://giwofigu.epizy.com/a_separate_peace_worksheets.pdfIn PDF document text
    • http://jusibutotesax.epizy.com/mecanismo_de_accion_de_los_antifungicos.pdfIn PDF document text
    • http://dukizovisepo.rf.gd/journalism_worksheets_for_middle_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 5156 bytes
SHA-256: 94d72f80db285be9e43ebf891a33a58fa794488eaa3d7349307b6b80e56ecf4d
font_01_sfnt_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 11224 bytes
SHA-256: 44e0b57489714bfc9faca551801d57d861de451f5c633c128b70bc98d408b421

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