Malicious PDF — malware analysis report

Static analysis result for SHA-256 778921238cbe2bf1…

MALICIOUS

PDF

76.3 KB Created: 2021-06-02 19:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16605c2a9270580a673bfc301cc4127c SHA-1: 72cadd2c37c3879a10b2db8ad10760faba76ea95 SHA-256: 778921238cbe2bf1c4ee96517409f9ca4e0bb7de12add75daad47eabf96e3bf4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document's content, though heavily obfuscated, suggests a lure related to financial templates, consistent with phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/pbw?utm_term=commercial+loan+commitment+letter+template
    • https://cdn-cms.f-static.net/uploads/4406516/normal_6047d6d5183eb.pdf
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/pamajeve-jutonugesirus-wotizom.pdf
    • https://pinuwolaterogus.weebly.com/uploads/1/3/5/9/135957395/675e1.pdf
    • https://zedimubaxujejit.weebly.com/uploads/1/3/4/7/134715534/javetapefe.pdf
    • https://static.s123-cdn-static.com/uploads/4402014/normal_60077840addb8.pdf
    • https://cdn-cms.f-static.net/uploads/4456389/normal_6029f98dd2cc6.pdf
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/583320.pdf
    • https://sevofesimexiv.weebly.com/uploads/1/3/4/7/134765092/xedomabimedew.pdf
    • https://static.s123-cdn-static.com/uploads/4455403/normal_600576e871c9e.pdf
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/3636173.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fatakalewene.pbworks.com/f/kefuji.pdf
    • http://ridelox.pbworks.com/w/file/fetch/144468243/talking_tom_cat_2_mod_apk_unlimited_money.pdf
    • http://sutodoromar.pbworks.com/w/file/fetch/144514665/74320288712.pdf
    • http://pamotekegopa.pbworks.com/f/54254147733.pdf
    • http://pulixojesu.pbworks.com/f/sopidiw.pdf
    • http://gemometis.pbworks.com/w/file/fetch/144511611/tozonutozibipodefi.pdf
    • http://negaboxa.pbworks.com/f/tabla_de_calibracion_de_bujas_dodge.pdf
    • http://jolunatimavu.pbworks.com/f/build_muscle_workout_plan_at_home.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415185/solving_compound_and_absolute_value_inequalities.pdf
    • http://gatasulupu.pbworks.com/w/file/fetch/144422328/anamorphic_lens_flare_plugin_fcpx.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e140.bin
b76ba7bdbc13caf009a47f172fa29076833ad8a14e76efcc843acf92d4e9f8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 4712 bytes
font_01_sfnt_off0000f11a.bin
d392eb320a3c341828a2442002573dc1c0060c1a649d41e65323e735437e8ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 10752 bytes
font_02_sfnt_off000115b6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 4324 bytes

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