Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7891cc4be36c09…

MALICIOUS

PDF

88.8 KB Created: 2021-02-15 11:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 51cbacc671d072b4dab3867110604b05 SHA-1: b1829320fb3819945ae512ce4affeb524f2f9d54 SHA-256: 5e7891cc4be36c09cfd265839f2d3ba6f38bc4120b4610968eacb73aaa913744
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and heuristic analysis identified it as a callback phishing lure. The presence of embedded URLs, such as https://seumenha.ru/wix?keyword=wayne+boze+mitchell, further supports the malicious intent, likely to redirect users to malicious content or initiate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/wix?keyword=wayne+boze+mitchell PDF link annotation
    • http://kdghy.online/257849468535sbok.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hgidica/66768705758.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/hjeihOG/82969672070.pdfIn PDF document text
    • http://sellforce.ru/bandiere_del_mondoa9v3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5ff2587777378.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/qtWKiej/define_guidebook_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ngiUqhd/godapajojunatugidiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/egjhgTm/centipede_vs_millipede_fight.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/bMCYgj3/14172010004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451231/normal_5fe4c1aad7457.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/4Pghgfl/78410588471.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/1ibhcxd/anti_theft_security_and_alarm_system_apk.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/vofadoloves/imdb_2019_indian_box_office_report.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/divowo.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/seropipivudezukimur.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_off00012165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12165 5072 bytes
SHA-256: 7217eca6e6c487261618942028371c996cc5573bbc890682af926aef43245917
font_01_sfnt_off000132a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A1 10360 bytes
SHA-256: d025abe7f7ae045dcda363e3cc83bc1b608f97debcdf2e012b3f6446daac3072

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