Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6749eda27f876b…

MALICIOUS

PDF

107.3 KB Created: 2021-04-05 13:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f47cc0ca10ca6590ebc797c5bb9da1e SHA-1: c28d2bdafacbd345340334c4a2a5079849104eea SHA-256: bb6749eda27f876b82cde264a989d255cdd20a449e9571f2ac5348e53c520f8c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document, likely intended to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • 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.
  • 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://nipisod.ru/123?utm_term=dvc6200+sis+data+sheet PDF link annotation
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/pupogudugisijibo.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/gosazosukudavaronipozuka.pdfIn PDF document text
    • http://ketrovk.xyz/db_super_free_wallpaper_hd_1080x1920kzwra.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/53073824071b5z89.pdfIn PDF document text
    • https://rovinimowi.weebly.com/uploads/1/3/4/6/134682499/2d3f877270c.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/fesunawebabajefuna.pdfIn PDF document text
    • https://cdn.sqhk.co/jerusuxelek/r27gchb/70257819404.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/64680986208.pdfIn PDF document text
    • https://kokarino.weebly.com/uploads/1/3/5/2/135299240/5245679.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/Pia9hjg/octopus_teacher_craig_foster_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/gL7ibNX/oscar_de_la_renta_dresses_prices.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/vuramil.pdfIn PDF document text
    • https://dugorokibo.weebly.com/uploads/1/3/4/6/134651225/217549.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/63002976834.pdfIn PDF document text
    • https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/tidasosex_vetabuwarum.pdfIn PDF document text
    • https://jefolujolu.weebly.com/uploads/1/3/6/0/136096950/jizimizokilemiz.pdfIn PDF document text
    • http://loveworld.club/palonu55h3u.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/jaL1iev/37110372430.pdfIn PDF document text
    • https://revanesowokaw.weebly.com/uploads/1/3/4/6/134652238/xakowufawi.pdfIn PDF document text
    • http://magnetfix.store/simulation_of_full_wave_rectifier_using_multisimox4zm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telifujovemevo.atwebpages.com/fumijifosisij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81391e10-2e5d-4b3c-8bc9-554d071e6cb1/tidufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aba4232-c4c5-4144-8ac9-5ac418d92754/huffy_bikes_20_inch_boy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ceaa7d3-95f9-49c6-a380-2585cc567b25/how_to_write_a_news_article.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8aa491-2c5c-4e68-ac7f-36ddb0772aac/ludonuti.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_off000163f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F3 5384 bytes
SHA-256: 8be933585b2e6c8d762d8194289becd313ed72f5732bf771a01722a125d58eba
font_01_sfnt_off00017650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17650 11984 bytes
SHA-256: 09ea2dd11545fd3bddf39ae842e78d1b460c31a1574fb27e934dbc1624783d3f