Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb198a36fad9090a…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 08:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9077c215704f4bca06d05a99d2db2fb0 SHA-1: bed29b70054ab533cb30b1f36eb198733b5a728c SHA-256: bb198a36fad9090a69e0332725e85e2da351affd7202093edf87e8ff24ccecf1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=clay+golem+3.5', which is likely the phishing destination. The document body, though heavily obfuscated, suggests a lure related to 'Clay golem 3.5'. No scripts were extracted, but the presence of an external URI strongly indicates a phishing or scam attempt.

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://golowaki.ru/wix?keyword=clay+golem+3.5
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/43dd425f02.pdf
    • http://setokanekema.mygamesonline.org/najitivaduvibugab.pdf
    • http://lorakuze.sportsontheweb.net/what_is_the_national_competency_based_teacher_standards.pdf
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5fee467872515.pdf
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5ff7d9164438e.pdf
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/2eaf56f.pdf
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/6014210.pdf
    • http://xiruzox.mygamesonline.org/98413599507.pdf
    • https://cdn-cms.f-static.net/uploads/4459321/normal_60346095b3314.pdf
    • http://raxawevamavox.getenjoyment.net/sariwuw.pdf
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/c9ab741e22ba50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lukafimagog.atwebpages.com/lunow.pdf
    • http://fixidil.atwebpages.com/answered_prayer_guaranteed.pdf
    • http://redifigikutusoj.myartsonline.com/callidus_commissions.pdf
    • https://s3.amazonaws.com/jewizopukuni/03_jeep_liberty_fuse_box_diagram.pdf
    • https://s3.amazonaws.com/takebemanijewok/august_2019_songs.pdf
    • http://duxegejuw.atwebpages.com/mickey_mouse_cartoon_german_flag.pdf
    • https://uploads.strikinglycdn.com/files/4076afda-809e-4336-ba10-17019d698bba/95777557412.pdf
    • https://uploads.strikinglycdn.com/files/2595c171-65fb-4666-9d9c-76720408262c/bosch_tronic_3000_us7_electric_point-of-use_tankless_water_heater.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5e.bin
b3b900c06857b6454314a03fdbddab2dd4dcd3b096113e72707b671442e72109
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 5056 bytes
font_01_sfnt_off0000fb98.bin
1c2c1a6bca4b6af3b2980ed86f927ae66108b2b9640f4d6b92ef79fab3cf6cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 11508 bytes