Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d7b44b0641e066…

MALICIOUS

PDF

76.5 KB Created: 2021-01-25 09:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7780902a4077d4e9605c0c52b5a08932 SHA-1: 04757513ee291000a05de845696f2a2229bfb6a4 SHA-256: a1d7b44b0641e06618ae10f465a21b1567873b811f85821a478ed256c283071a
156 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 0.9998

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 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.
  • 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://jacksth.ru/aws?utm_term=aluminum+properties+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416675/normal_5fd70d3650b93.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/9E1dhb0/pop_cubes_hints.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/jjEJQhI/real_car_parking_master_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/hgejdhe/vomuwuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/ogcnjbi/live_streaming_apps_for_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/RsNifib/tricky_bike_vs_train_racing_funny.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/gMggpra/lefag.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/tjb0pgf/mivuzukuf.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/eTsIjcF/youtube_fernanfloo_saw_game_solucion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fd7c2d3e99eb.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/SDHhhig/cute_captions_for_pics_with_your_boyfriend.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/zikoramizamiwus.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/xopupapubodavaxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_600cea6433376.pdfIn PDF document text
    • https://womarunere.weebly.com/uploads/1/3/4/3/134315700/pidusovasudovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_5fd7061c98230.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/wopari/patul.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/javapofuviz.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/pawupapuvatasazowumuvaraj.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_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 4848 bytes
SHA-256: d3c8ba1bb0ce097faa75e6ac7693a4537ba3a325038c857a4ba835bdf78012b8
font_01_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 11176 bytes
SHA-256: 77023e93a9aab1e37f8648e918926795601e4419a58c983aaa247f49c23f267d
font_02_sfnt_off000116ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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