Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7cbf88e101759a…

MALICIOUS

PDF

97.0 KB Created: 2021-02-20 05:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 10155cb1b6d66ff68ff73c3bf3352bd6 SHA-1: d5d437c6b5ecdb52870d95c4070492edc207c61f SHA-256: 7b7cbf88e101759ae93c37c72efcda65510c5fc2286cffc76400fbe5a60f0eeb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://baarspo.ru/strik?utm_term=sony+rx100+vii+best+video+settings PDF link annotation
    • https://cdn.sqhk.co/pidefatop/G2WjcGh/vedoxavobiwunonimudux.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/hhg0dsE/special_forces_group_2_hack_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/TB1ieji/govomosejisob.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/Yicfhht/stellar_wanderer_mod_apk_10085.pdfIn PDF document text
    • http://allieshouseofhope.com/55876701354jzxnk.pdfIn PDF document text
    • http://educationonline.website/ms-7641_ver_4.0_driversayam7.pdfIn PDF document text
    • http://avto-document.site/fractions_to_percents_worksheets_7th_gradefp4vq.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/ihghnAG/37616267516.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/jbibjjA/vr_zombie_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jehhfji/petukenafejavuvibuge.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/gafedupeba/kaththi_bgm_free_zedge.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/96204953162.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/answer_key_group_d_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/76953523141.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/troubleshooting_handy_stitch.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/zadusubamuruxabijerapik.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_off00013a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4D 5420 bytes
SHA-256: bb4c6edbb1a3088bd9f7ee8026d7039e1c0cb74e90337eaedaa7fad6defd1d7d
font_01_sfnt_off00014cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDA 12368 bytes
SHA-256: a4aaf88d54b85b162b2acbd3d0deef85a8660e20f9a02f3ea7f7bd5c0a25f1d4

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