Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d42cb91a8277b7…

MALICIOUS

PDF

95.1 KB Created: 2021-04-02 18:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aa876acbb8cd63841729a426f9c08219 SHA-1: 73d262eb494aa777d108db5feaeaae25eaee1d77 SHA-256: c7d42cb91a8277b7dca38df69e870e7c6187326fc6d279a5579bb2afaca333ac
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or facilitate phishing. The presence of external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=best+budget+manual+tile+cutter+uk PDF link annotation
    • http://samemere.mygamesonline.org/adverbs_definition_and_examples.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/maschine_mikro_mk2_setup_guide.pdfIn PDF document text
    • http://ecoservice-vlad.ru/wesemutaliwabutomapebg79s.pdfIn PDF document text
    • http://wolotalute.iblogger.org/apush_textbook_old_amsco.pdfIn PDF document text
    • http://grusha.space/consolidated_appropriations_act_2016fs07p.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/difference_between_virus_and_bacterial_cough.pdfIn PDF document text
    • http://sikevemekoma.mypressonline.com/antiheroes_libro_descargar.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/improve_your_vocabulary.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/ontologa_definicion.pdfIn PDF document text
    • http://banquepopulaire-fr.org/tixatupiwaluwopesorakahs3a8.pdfIn PDF document text
    • http://eroganoficial.site/42775828055veyoa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_b6af15e05a3f4d1d9955a9961c95155a.pdf?index=trueIn PDF document text
    • http://jasesazolaf.myartsonline.com/funilowav.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/vawupadorolomagaro.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_44313b93f03e4b1f8f75de713cfc1fe2.pdf?index=trueIn PDF document text
    • http://visagiza.epizy.com/vazinilabofuzewujabeka.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/how_to_get_bigger_arms_with_bodyweight.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/ecchymosis_plural_form.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_off0001387d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387D 5512 bytes
SHA-256: 462d4491b716dc0cfda6ada0c007abde644665ff422c8473c6426ad27253e436
font_01_sfnt_off00014b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B23 10544 bytes
SHA-256: ec668aa228d83c24fc0466f636f248317ae1e4e61d8c2f2ca43d775f7d0de373

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