Malicious PDF — malware analysis report

Static analysis result for SHA-256 a108a996510e29fa…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 05:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b198d801a4f0eb64b7baa31521e927f4 SHA-1: a6d1b446b2bc59100a5dabe6ba45133ec2bd2979 SHA-256: a108a996510e29fad10c0a426424756eda684fa593afbb11a88d7f94433e53ce
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=how+to+pronounce+ed+in+english+pdf PDF link annotation
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/7d2833f281f3.pdfIn PDF document text
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/8dc0c75cb7.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/banemeberu.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/biminagawur_kobugizoxed_nanebivu_rezodowib.pdfIn PDF document text
    • http://namedaun.fun/south_park_fractured_but_whole_nudity0248w.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/3c0d592.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/pivaw.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/xodawopel-wakonuwomek-falekubeve-pijokomarowat.pdfIn PDF document text
    • http://idealica-italiaofficial.site/casio_g_shock_ga_1100_battery_replacementyvaoy.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/5986273.pdfIn PDF document text
    • http://whalesqpa.fun/xigasenupalenolejetigk4eop.pdfIn PDF document text
    • https://cdn.sqhk.co/kefiruge/dnhdihc/83840726713.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/dhjaUME/pixel_combat_world_of_guns_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fd7edae81e76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_6031f2e00c811.pdfIn PDF document text
    • http://lianhua.life/701112518bpl23.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/d3gjcL5/50373015741.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/dajefijavoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_604007c765dae.pdfIn PDF document text
    • http://tdsevsvet.ru/61298410740ryvpj.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/8295d57a26f9c2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzasapexuwuju.epizy.com/astrology_answers_adrian_duncan_reviews.pdfIn PDF document text
    • http://wupejubofuvom.rf.gd/72363844845.pdfIn PDF document text
    • http://nokarox.rf.gd/xubewenekefidibubugasu.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_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 5260 bytes
SHA-256: 1274f135133fdb35fa7bee3f03e2f30d9784d1f040b23634f406c2a4b99588a3
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 11268 bytes
SHA-256: 85f1b7c29890b51e6a410a97eb5457814cb3c6b75d38a29b8d0d0700b647e739

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