Malicious PDF — malware analysis report

Static analysis result for SHA-256 6148abf9a0f1781a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 18:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a1c2a02db79eb7b55c9aaf5ef0f84668 SHA-1: 59d714affec465380bc4be7cacafbe877867d9f9 SHA-256: 6148abf9a0f1781ac57becb361e265880a1d1e911836bcd1fb5a2b7ae25a8cc2
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document likely contains a phone number intended to trick the user into calling, consistent with callback phishing or tech support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may exploit vulnerabilities or lead to further malicious content, hence the inclusion of T1059.007 and T1203.

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://baarspo.ru/wix?keyword=notice+of+intent+to+lien+form+nevada PDF link annotation
    • http://sazaleve.22web.org/diteparetidobivotubisosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445343/normal_5fffbd3293ade.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/cbjg1jg/purekopimititekulasemup.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/dib4Mhi/consignment_shops_open_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/tSHWRgj/61892674432.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/ibUw8hd/download_game_stickman_falling_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/ejfhb3A/sadavowikuxez.pdfIn PDF document text
    • http://najitop.22web.org/jeweniwefosezufaf.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/ig1Mj7N/arcade_donkey_kong.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/Kgdjjii/5377320550.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/bjbheib/history_of_ancient_civilizations.pdfIn PDF document text
    • https://cdn.sqhk.co/susorajin/tzjhs5d/business_plan_template_word_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/gnhg0id/30882516293.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/AialciV/42187918587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 5020 bytes
SHA-256: 50a3d41ed9755bbc532003104064f5c51ab042c01a2d2ad719570e412eff504a
font_01_sfnt_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 10604 bytes
SHA-256: f3f2a8d40c2128586bb19c71d689fe2c2b116648405f5cda4c8f7cb7681c8163

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