Malicious PDF — malware analysis report

Static analysis result for SHA-256 f617b44284597dac…

MALICIOUS

PDF

77.0 KB Created: 2021-02-13 22:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f3471506c2b56f34634ddce6875f578b SHA-1: 245f02b2003633fd447e5b1c010d4c3abbb43114 SHA-256: f617b44284597dac5838fc15e2127e0b0ff9fa0e06629f5042daba36ab084dbc
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to redirect users to malicious sites. The document body contains what appears to be a wine bar address, likely a lure to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=gordon%2527s+wine+bar+london+wc2n+6ne PDF link annotation
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/6694601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6016b612ada01.pdfIn PDF document text
    • http://nefritthebestthing.site/jill_poole_textbook_on_contract_lawfpfgm.pdfIn PDF document text
    • http://rukunikuxajosog.22web.org/billionaires_club_video.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/1950166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_6027bbdf20d67.pdfIn PDF document text
    • https://nijusalelazi.weebly.com/uploads/1/3/4/8/134875584/9968904.pdfIn PDF document text
    • https://powilamalowigos.weebly.com/uploads/1/3/4/1/134131405/sosobarezifogor-benupulinometoj-nezudidivozose.pdfIn PDF document text
    • http://pirizatifi.iblogger.org/companies_act_2006_small_company_directors_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_600fdffe3459a.pdfIn PDF document text
    • http://parralax.net/3ds_rosalina_guidet6f1r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fdffb64b4c35.pdfIn PDF document text
    • http://weex.info/batman_1_full_movie_in_tamilhhwzz.pdfIn PDF document text
    • http://gagezejiwakale.iblogger.org/cost_breakdown_sheets.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/boss_gt_10b_manual_espaol.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/pizuta-nobivutiwumani.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/9387628.pdfIn PDF document text
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/6210514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd0e3c4542e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelopet.epizy.com/free_todo_list_html_template.pdfIn PDF document text
    • http://ruditofejew.rf.gd/esri_arc_hydro_tools.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_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 5516 bytes
SHA-256: fedf5b56e2a12f87b901960934cf2ce8436d092122c852342f9ce7a16b371a15
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 10496 bytes
SHA-256: 1479ace30067f030a5038522b307c4c5675e3231682c9bb478a25c0426a5007d

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