Malicious PDF — malware analysis report

Static analysis result for SHA-256 6140862e893020ef…

MALICIOUS

PDF

156.5 KB Created: 2020-11-22 21:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6bc2e187ec8c0135a0a21534777445f4 SHA-1: 133c4ed15d0baf87435f265b07659d4edab58fd0 SHA-256: 6140862e893020ef71989d619b60c2b81412539978433a354cd67a76596df197
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=contemporary+comedic+monologues+female'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=contemporary+comedic+monologues+female In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_5fa5bbf0587ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5fb2ba524aa33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f97c2419a83a.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/leguvefu/60429442958.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/ssc_mts_answer_key_2019_8_august.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/asbestos_awareness_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b202a2-9092-485f-a70c-9a444b5dfb1f/etho_varmukilin_kinavile_mp3_free_do.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/45792104860.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/seven_little_words_puzzle_answers_today.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/49609528497.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/72901694732.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_off00022b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B3F 5484 bytes
SHA-256: c40824d8ba9e7c79697bcb0df1003a35d307cb43835ce6a15e0e27068ade4433
font_01_sfnt_off00023dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DD3 11572 bytes
SHA-256: 987dc1ff7a277591172bd5881f54945bbfeef024e42e875018cafb2e09c454d6

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