Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a3c67acb4a3acd…

MALICIOUS

PDF

101.6 KB Created: 2021-03-19 06:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 314dc524393a1a0510f193a8674eb563 SHA-1: 127cc040f30d93a791290929297b6c1b81f5c6e1 SHA-256: 70a3c67acb4a3acd6bc57af6cef6bc918b4dcaadb7f2e4ed2383c96bb74ed18e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jumiwimov.ru/strik?utm_term=what+is+norms+pdf PDF link annotation
    • http://experiment.website/lolanozqnzm4.pdfIn PDF document text
    • http://shimano-stradic.ru/dell_b1160_toner_price_in_sri_lanka3avq0.pdfIn PDF document text
    • http://sarkife.site/tigepemogbb9f.pdfIn PDF document text
    • http://ital-tess.space/caller_name_announcer_pro_mod_apkl06lg.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/59200876527.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/peter_ilkesi_dilbert_principleejeih.pdfIn PDF document text
    • http://cpskras.website/manualidades_con_folios_de_papel_blanco9edzy.pdfIn PDF document text
    • http://smeshnoykir.space/fingerstyle_guitar_lessons_for_beginnersy2rry.pdfIn PDF document text
    • http://titanof-filtr.ru/best_buy_coupon_code_may_2020bkfla.pdfIn PDF document text
    • http://avlto.best/xebodizuzaxagonufirufexefzb8o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folusezik.epizy.com/40709330525.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/what_does_omitted_answers_mean_on_sat.pdfIn PDF document text
    • http://feferabi.atwebpages.com/baxi_luna_3_comfort_310_fi_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/fipegaverikorodo.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/38377099218.pdfIn PDF document text
    • http://wovolujaniwuge.rf.gd/vogobono.pdfIn PDF document text
    • http://lamisegowa.epizy.com/wixitelowuzajope.pdfIn PDF document text
    • http://toxukanubevaga.rf.gd/vezebefazawinuxilir.pdfIn PDF document text
    • http://welidigukiru.epizy.com/crossfire_one_with_you_free_download.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_off00015016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15016 5264 bytes
SHA-256: c3f080704d692aa1a5668991b035a02984b9793054d7e2dd8670f1a01b23ac59
font_01_sfnt_off000161dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161DD 12040 bytes
SHA-256: 34f579c0a9e927a64fffcfe63b22b229dada7c04d26f46cfeff59dbabf4eba81