Malicious PDF — malware analysis report

Static analysis result for SHA-256 5365864f0680ed47…

MALICIOUS

PDF

73.6 KB Created: 2021-06-14 04:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e3aee21b6e7b12dab9f068f91892c7b SHA-1: 9ce8c1576fb18b38b335c97bf60f2f28e0e0530a SHA-256: 5365864f0680ed4797c742b4d1fb56023acb6adcee93c0a9c4504003ae8f4929
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-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://catamma.ru/pbw?utm_term=mcq+on+networking+concepts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5fdc2255a6e3f.pdfIn PDF document text
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/6521307.pdfIn PDF document text
    • https://bifuwesulowun.weebly.com/uploads/1/3/4/3/134308915/julonetuma_vatudotuboteve_sofiwoz_lidut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc720a6e643a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456372/normal_605d46e9273f2.pdfIn PDF document text
    • https://midinomuxew.weebly.com/uploads/1/3/5/3/135391973/lunugulizifiram.pdfIn PDF document text
    • https://kidogotetivi.weebly.com/uploads/1/3/4/3/134375399/gasuvojiruga.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/5079369.pdfIn PDF document text
    • https://wejatinolu.weebly.com/uploads/1/3/1/4/131438249/823595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_60246b144171d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_605538b39d511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papedisuk.pbworks.com/f/remo_duplicate_photos_remover_apk.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144415797/fedefemu.pdfIn PDF document text
    • http://vevokofeju.pbworks.com/f/manufacturing_product_audit_checklist.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144427947/dieta_para_perder_panza_en_una_semana.pdfIn PDF document text
    • http://zokosixaged.pbworks.com/w/file/fetch/145203645/wodejaturusoturapitenigew.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144461559/borumidelejowusotaboba.pdfIn PDF document text
    • http://vowijeve.pbworks.com/w/file/fetch/144775287/tufusirovebafenunewetubo.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/145247847/download_windows_10_64_bit_full_version_2020_iso.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 5148 bytes
SHA-256: d1ff7d2d828609dfcb86d6d8412aad185e1cba751f1aa9e0c6fe66b1080256f9
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 11940 bytes
SHA-256: 4d5ac6d89e17677baa4a6ed7ea1851254f5b6bdf9b243267ce5a91493ff3bc52

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