Malicious PDF — malware analysis report

Static analysis result for SHA-256 186d45f43ab064c1…

MALICIOUS

PDF

75.2 KB Created: 2020-12-26 18:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 687ce196bc6067e05cd0b018ef7a4d92 SHA-1: 1384a8f1d1243e77de76e77cd8b7d87bff206ebf SHA-256: 186d45f43ab064c1b8ceaed22754d636e6bb04dbc550cf4d929b3c7c1c4b0492
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/aws?utm_term=wyoming+severance+tax+reporting'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload.

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/aws?utm_term=wyoming+severance+tax+reporting In PDF document text
    • https://cdn.sqhk.co/nopawuwam/zjjvidK/47213698915.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/FjgjfLe/freedom_or_union_freedom.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/ihgjGib/73219411411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5f9ce7d07fe6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_5fa0c09ff3521.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/paxunu/chori_chori_chupke_chupke_pk_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/24985165967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbb6666-cf55-41b0-b7d6-1485b4c9b8c5/pazorurarajofomani.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/2112193959.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/62858250724.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5464 bytes
SHA-256: 1bfc1ca89e4b629d6965e03dbd8135c4e3a83b37a1f0ea1aa600b4e7ece64c9f
font_01_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 10976 bytes
SHA-256: c40b900515db2832c766890703ea406542b457f3b7fb161b534e5ebc6ad89f4d

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