Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7138351fd18426…

MALICIOUS

PDF

118.5 KB Created: 2021-03-29 02:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6405d0e634381d0265ab6e3f5ef7602 SHA-1: afb00b1fe8862f81b606e4139b77967c6c01b8c5 SHA-256: 8e7138351fd184265c0d482a0dfdcf1f22a9a28862d8d8027d16dd3c8970e855
124 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically mentioning a callback phishing context and a visual download button. The embedded URL points to a domain associated with malicious activity, and the document body, though heavily obfuscated, suggests a theme of legal documents like warrants and summonses. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=warrants+and+summons+cheyenne+wy
    • https://cdn.sqhk.co/furigelo/Ihfieih/basuzabeziboje.pdf
    • http://forexgeeks.net/pemmican_bars_how_to_makec8hxz.pdf
    • https://cdn.sqhk.co/sovokeduseb/W0he5hd/47443730952.pdf
    • https://static.s123-cdn-static.com/uploads/4459780/normal_6005aea14f000.pdf
    • http://carbackseat.site/imprimer_etiquettes_dossiers_suspendus_elbao5p44.pdf
    • https://cdn-cms.f-static.net/uploads/4418778/normal_6056ab9b26b7c.pdf
    • http://greatholl.com/wolokokehgdid.pdf
    • https://cdn.sqhk.co/senuziker/iicEha8/3d_home_design_software_floor_planner_online.pdf
    • http://ru-order-687646765445.art/29203566353qv6b7.pdf
    • https://cdn-cms.f-static.net/uploads/4483071/normal_6052ba0a3aab0.pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_6032c7fe19b9c.pdf
    • https://cdn-cms.f-static.net/uploads/4450639/normal_600d967f99522.pdf
    • https://cdn.sqhk.co/bitenutugiw/zv6xiay/entergy_bill_pay_number.pdf
    • http://youla-24.cc/weather_worksheets_grade_577rvj.pdf
    • https://cdn.sqhk.co/pixazizaze/gjRnxq8/hornblower_sf_wedding.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/74373cef-a90a-4122-95c1-b1fe1923f2ee/what_is_the_best_long_pole_hedge_trimmer.pdf
    • https://s3.amazonaws.com/baxegezivumi/philosophy_of_science_in_sociology.pdf
    • https://s3.amazonaws.com/xurixado/chhota_bheem_cartoon_wapwon.pdf
    • https://s3.amazonaws.com/ximupuv/bauer_bodoni_bt_roman_free.pdf
    • https://uploads.strikinglycdn.com/files/bb088f84-390f-4b84-97d4-2e15e7dd0eea/refulajufinidomobapiwa.pdf
    • https://s3.amazonaws.com/fezenur/past_tense_regular_and_irregular_verbs_worksheet.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_off00018f54.bin
06b1aa7dd27dcca50915dbf3d00e9db75aba00efa91dde4b54d1982564008b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F54 5352 bytes
font_01_sfnt_off0001a176.bin
83a3aa0a1c69729d608f0f2469995edf492345ff744f5c44f54736b919f3104e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A176 12152 bytes

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