Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31a1acec544e225…

MALICIOUS

PDF

67.9 KB Created: 2021-02-10 12:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca747d05196d45705dc64a8294f29db3 SHA-1: 0e881aff0a84aabb4171f0ba8b77812624378606 SHA-256: a31a1acec544e2256e3324f90aa3b951af0a92a4ad3bcaf0c0102a2391121664
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of an external URI points to a potential redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=german+shepherd+rescue+indiana PDF link annotation
    • http://kartaidatodemeleri.com/duck_life_3_hacked_unlimited_everythingm542t.pdfIn PDF document text
    • http://fastpeysistem.online/mow_zombies_mod_apk_moddroidfwpa3.pdfIn PDF document text
    • http://kushtanash.ru/techniques_and_principles_of_language_teachingodhjn.pdfIn PDF document text
    • http://premiumpornclips.com/legesufipawazame3eq7t.pdfIn PDF document text
    • http://alcozerox.com/ruxif8o0hk.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/bPgckay/57261033776.pdfIn PDF document text
    • http://trend-sales.fun/mindfulness_colouring_sheets_flowers2fnl1.pdfIn PDF document text
    • http://makeyourself.xyz/guvusebumugixipewinida6pff2.pdfIn PDF document text
    • http://momentshop.website/47568737872ivirp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/19537999770.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/dengue_ns1_test_report.pdfIn PDF document text
    • http://bipedok.epizy.com/xedubomipufiruw.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/mexax.pdfIn PDF document text
    • http://votitagupen.epizy.com/musubusozi.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/tezos_coinbase_answers.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_off0000cd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD09 5312 bytes
SHA-256: f8129e3b1eeadce7f295f4f03b82cd4619ff99aaf16d1696b21daec50c886f04
font_01_sfnt_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 10520 bytes
SHA-256: 1c57393a247f31bf24e5d738f1c1530de7f2cd182ea300b208aa4efdaa37e92f