Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a2c8b906c90001…

MALICIOUS

PDF

74.8 KB Created: 2021-01-02 00:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fc960241ad981a859836a16f9b9426c0 SHA-1: da84682b57be354d08ed56c3de8385d0e62df5b0 SHA-256: 93a2c8b906c90001306cfa158ebc5718a5848912b9b05f49d2bee5a922ce7d86
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is flagged as critical. The document body, though partially obfuscated, suggests a lure related to 'crosswords'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of malicious URLs points to an initial access via spearphishing attachment.

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://ggtraff.ru/aws?utm_term=large+printable+crosswords+with+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5f91fe936570f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5f9506ac22740.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/4tNXzgj/niforotikolifixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f8b9955d4cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fb3521692779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fed46d6c070b.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/hbTifhh/75792828159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8727169f210.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/napoledunadigo/nanozupidubizawagasefun.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/18520002925.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/lupovires.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/opsc_assistant_section_officer_previous_question_papers.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_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 5296 bytes
SHA-256: 8a647524e2cfa573942c76f472620e697fe483e35af7aa6f42e1b74db8866a97
font_01_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 11296 bytes
SHA-256: 08197cacbcb0d03a3573ac466cce266255d42e5035fa3f78b04645574883ccc0
font_02_sfnt_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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