Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90fe94e45fd6c67…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 10:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2e72e7906550b1684f3c54afe85b9a6f SHA-1: 8ef1d9a92dad4cfcc18aebc040d9dedc87de9691 SHA-256: a90fe94e45fd6c67e5a493cefbfb10725d6b78fd82d4dd61c4c842fa5e5131a3
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within seemingly legitimate search result pages. While no scripts were directly extracted, the structure and URL patterns suggest this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/award?keyword=vernier+bevel+protractor+pdf PDF link annotation
    • http://investmag.org/suzuki_quadrunner_250_2wd_carburetorz380h.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/faberaxe.pdfIn PDF document text
    • http://indir-kazan.com/simple_subtraction_worksheets_for_grof561.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/eijZheA/double_clutch_riddim_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502175/normal_602b64912f72a.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/hhhhhfF/68389085506.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/bayou_breakdown_sheet_music.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/black_and_white_photography_techniques.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6038748c6977c.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/7710442.pdfIn PDF document text
    • http://helpcopyright-service.com/nodataditoxewotosu0jmsl.pdfIn PDF document text
    • https://xogalorezekulim.weebly.com/uploads/1/3/5/4/135400954/9845612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_603caf6aee7ca.pdfIn PDF document text
    • http://draiwenstore.online/supplementary_guidelines_on_vertical_restraintsy6lum.pdfIn PDF document text
    • https://sozejelef.weebly.com/uploads/1/3/4/6/134600180/sogibasezalin-dukexoxep-tisaduzaxilo.pdfIn PDF document text
    • http://risiwivozival.iblogger.org/wasumexovagudukinabitun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxolavomuzo.myartsonline.com/megavetijufinomemikafe.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/brihaspati_vrat_katha_download.pdfIn PDF document text
    • http://refewededuxita.epizy.com/91937024129.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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 5136 bytes
SHA-256: afc898f985ef0045e81aa3cfe1e067bc2ea4d36ddbde1d24dbd0228d14b0a5b2
font_01_sfnt_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 10540 bytes
SHA-256: 4abd3519c24f86175dfb309d21dadb8674e2493f0dcca7e8601dbd56b7049112

Open this report in the interactive analyzer, or submit your own file for analysis.