Malicious PDF — malware analysis report

Static analysis result for SHA-256 2650b5ddc2e31941…

MALICIOUS

PDF

63.9 KB Created: 2020-12-20 02:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1cc10d1fd034e20ad1ba40b0c841b4ff SHA-1: e16fc7236d85593cf7dbf468ab4c7350a15f9bc0 SHA-256: 2650b5ddc2e31941d2d8ce8e856c50d12a2630b4b5a50ba2926b3e375d399366
222 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific link to a known malicious redirector, indicating a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking the malicious links. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/strik?utm_term=singer+31-15+needles In PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/fiwika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fde838c7fc60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fd7928f3021c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5f9132e8bde35.pdfIn PDF document text
    • https://botomaluxezevip.weebly.com/uploads/1/3/4/3/134340767/cacc92.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/cc18584a1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5faf378df07e7.pdfIn PDF document text
    • https://keziripar.weebly.com/uploads/1/3/4/5/134522929/ligirojomareg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3906332a-c819-469f-82f6-508995e97de2/dakula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1212e38-5d0f-4786-8bf1-b990173593d7/ap_latin_practice_exam_multiple_choice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb80052-02b2-436a-99b1-c4540978ca0e/online_quiz_answers_in_source_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafff6f1-7d10-440f-bd42-9e8993e77327/11370140130.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_off0000baed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAED 5256 bytes
SHA-256: 2fea3d1547cd382ed6aaeb3a5a8185168c631ca505ea4ecb3f693c97a9883e9c
font_01_sfnt_off0000cced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCED 11324 bytes
SHA-256: ed75f241908f2d395e11257020082ddba42d32e5b9ac3df589c61dd13d25b4d4

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