Malicious PDF — malware analysis report

Static analysis result for SHA-256 99988683dce4101e…

MALICIOUS

PDF

74.9 KB Created: 2021-04-24 06:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d783e4e8ab0d6b648418f56fd854e6 SHA-1: e2e67fffe865921e836dabf0a89476299d6e30ea SHA-256: 99988683dce4101e30b4eaac75707d52fe2ebe61860a3ed0b1706c2ad84fb00e
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://dafemum.ru/strik?utm_term=thermolyne+furnace+62700', which is likely the malicious payload delivery URL. The document body, though heavily obfuscated, suggests a lure related to a 'Thermolyne furnace 62700'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=thermolyne+furnace+62700
    • https://cdn.sqhk.co/widafopaj/jhigmRw/twilight_struggle_solo_rules.pdf
    • http://opensoda.pro/31791431444ja5ng.pdf
    • https://cdn-cms.f-static.net/uploads/4456132/normal_605b4a030efd5.pdf
    • https://cdn.sqhk.co/wisaputal/EjfjaZG/temumaruvel.pdf
    • https://cdn.sqhk.co/vilosezuj/whgijig/8060930564.pdf
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5ffd6f818f030.pdf
    • http://domen3.club/vavebobawixuluwonibowuzmn.pdf
    • http://yildirimotobursa.com/12206756261qre9q.pdf
    • https://cdn.sqhk.co/rudolikube/bKQd6je/pongo_abelii_pronunciation.pdf
    • https://cdn-cms.f-static.net/uploads/4373768/normal_6064ea2a02959.pdf
    • https://cdn.sqhk.co/firufolati/ghCEXjh/acustica_fisica.pdf
    • http://www19216801.site/cost_reconciliation_statement_formattq124.pdf
    • https://cdn-cms.f-static.net/uploads/4449600/normal_605ddcd516c03.pdf
    • http://bestita.space/watson_theory_of_caring8hwtn.pdf
    • https://cdn.sqhk.co/tijovomiv/gg0MBje/7183227500.pdf
    • https://cdn.sqhk.co/lexijunibul/jgghiq3/sky_clash_lords_of_clans_3d_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gomupinoteripa.epizy.com/74363157015.pdf
    • http://bipofixijanafuf.rf.gd/pozimifefolumu.pdf
    • https://uploads.strikinglycdn.com/files/e94f55e4-e882-4cd2-9273-b201e554c24f/diablo_3_couch_co_op_ps4_gameplay.pdf
    • https://uploads.strikinglycdn.com/files/e4ba3b64-eae4-4168-989a-d617ecce9e58/keurig_k75_platinum_coffee_maker_walmart.pdf
    • https://uploads.strikinglycdn.com/files/fe8de9f0-5f6f-41ac-aef8-7990b1a2ddf0/shimano_105_r7000_rear_derailleur_dealer_manual.pdf
    • https://uploads.strikinglycdn.com/files/fc7242b7-88e0-4d5a-bd72-060cf5053e7e/4155493886.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_off0000e834.bin
10a242132b38757855c8361981a4d38b1cc7e37e87841800d12d7a4e2c5d4151
pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 5504 bytes
font_01_sfnt_off0000fad1.bin
a48eb69f06d56682688c963eef7aff00c1ed943c26e1810351296589bde43b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 10412 bytes