Malicious PDF — malware analysis report

Static analysis result for SHA-256 851750699a0408a2…

MALICIOUS

PDF

81.0 KB Created: 2021-04-16 12:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9165d59b66882257e6562e177c9819f0 SHA-1: 77fd6964a805a266a1b04b73861949ce8fbdff0c SHA-256: 851750699a0408a288259621d91609b258268e1c6a7be24bee74ce4a67022b6e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to 'gun safe review'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware delivery 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://seumenha.ru/strik?utm_term=stack+on+gun+safe+review PDF link annotation
    • http://kadaxejob.mypressonline.com/calculus_12_review.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/1699301164.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/ijkNieW/marketing_definition_of_promotion.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/34969464494.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/iiicEie/maki_favorite_social_networks_in_one_tiny_apps.pdfIn PDF document text
    • http://gonaxepafa.iblogger.org/53192889267.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/dghifjb/xagevuxusapuxewakuzuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/sri_rudram_word_by_word_meaning_in_telugu.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/business_environment.pdfIn PDF document text
    • http://takumoz.epizy.com/82538925412.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/alcatel_one_touch_manual_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/motherboard_gigabyte_drivers_free.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/aiag_vda_fmea_handbook_draft.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/48601594848.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/62744262410.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/76750950741.pdfIn PDF document text
    • http://davupuvaf.rf.gd/babuveronavujofofuzom.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/rumobakogozi.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/sowubipapidebuvafepiridu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 5336 bytes
SHA-256: 34c3be33c5da730123ddeeac5eecd1f9d6c57b0b940e2a06959b1336cc219edc
font_01_sfnt_off00010f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 11200 bytes
SHA-256: c194f3150be8bcf3d1fb1cd25ccbf038094d216f26cbc65f315af87322162d73

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