Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d0f5f69ffaa2e8…

MALICIOUS

PDF

77.8 KB Created: 2021-01-17 00:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: df8ec467f1837163f8dd58b4c686ec25 SHA-1: 5fe1f0fc2b951c529de63f9916637de649e837ab SHA-256: a6d0f5f69ffaa2e82ad876defc5cfa6263c3a949a4b14532cf4e85efb26f8477
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=bantu+migration+effects'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=bantu+migration+effects In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fe8fbf358ddf.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/bC0Iidc/56060301795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/figugipopar/college_admission_term_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/attagasam_tamil_film.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/kindergarten_common_core_standards_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/74166995473.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/gotumolamulo.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/ampere_3._14_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/jesevi.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/balance_general_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/73984558953.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/27022376716.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gasarexisimogejuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 5100 bytes
SHA-256: be6707a3939d8ca698627107ea11907491573ee9dcdc3b10cd3570c3a0123faa
font_01_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 10276 bytes
SHA-256: 3805209dcb392d474ef405cfa5ac9444103d1e2dde7040ad920ac2055dee423b
font_02_sfnt_off00011cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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