Malicious PDF — malware analysis report

Static analysis result for SHA-256 7131832e997de722…

MALICIOUS

PDF

74.4 KB Created: 2021-04-12 02:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4800edca4eea57fc6328e217a09a22b SHA-1: 1853b44f7bdcf8e796837f6bd80cf3b6f7d26135 SHA-256: 7131832e997de7227eefe80c5bcfecb16c31e11eeb4df69c078541690a8753ea
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and an external URI pointing to a suspicious domain, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or scamming. The embedded JavaScript is likely responsible for redirecting the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=coleman+furnace+blower+motor+problems
    • https://static.s123-cdn-static.com/uploads/4482848/normal_5ff5c1e9ef59d.pdf
    • https://cdn-cms.f-static.net/uploads/4480170/normal_60198edae3a87.pdf
    • https://cdn.sqhk.co/xojurolaruk/pngdzgg/bostitch_stapler_02210_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4475997/normal_5feaf04c74cc0.pdf
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5fea0c3578057.pdf
    • https://static.s123-cdn-static.com/uploads/4446759/normal_6003cac9f1d04.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5ff713bc414fc.pdf
    • https://cdn.sqhk.co/wabogojo/1jchaXY/icomania_icon_quiz_answers_level_16.pdf
    • https://cdn.sqhk.co/novigigexuxo/hi9jjPc/spanish_english_translator_app_no_internet.pdf
    • https://cdn-cms.f-static.net/uploads/4423700/normal_605189acd5adb.pdf
    • https://static.s123-cdn-static.com/uploads/4457014/normal_5fc9af9d27fa1.pdf
    • https://cdn.sqhk.co/naveropifo/gbrgpJF/20147896173.pdf
    • https://cdn-cms.f-static.net/uploads/4465907/normal_6019945768172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wusone/10429873497.pdf
    • https://uploads.strikinglycdn.com/files/f1e2a883-7446-48ff-8708-c1bbb872018b/32703850602.pdf
    • https://s3.amazonaws.com/bogijexu/charter_spectrum_remote_codes_lg_tv.pdf
    • https://uploads.strikinglycdn.com/files/ce2aa7d6-0212-4a94-beac-7cffd861caf4/rules_cynthia_lord_characters.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/how_to_set_the_timex_alarm_clock.pdf
    • https://uploads.strikinglycdn.com/files/7bad929e-0b3d-4b62-bc75-498f0e8a001e/wubanejesag.pdf
    • https://s3.amazonaws.com/patotale/xazivanas.pdf
    • https://uploads.strikinglycdn.com/files/5dc99eeb-7864-41c3-95b5-80d13ddf7615/xebarigoludekibaro.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_off0000e6e6.bin
e40cee8743e1b3ba75b3ba94652fa0df6014ab26bda57eabb2cc6c70d24d9d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 5296 bytes
font_01_sfnt_off0000f8dc.bin
f98c28dc8817fb1c8bdfa2630fd88ec32a929f39c2aeb58171a6150c4e70320a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10184 bytes

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