Malicious PDF — malware analysis report

Static analysis result for SHA-256 56655498a1db566c…

MALICIOUS

PDF

67.0 KB Created: 2020-11-24 20:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6234f61e87cf13f6a0efcace66731d5c SHA-1: 174e3756e353134f3cd5a06b1b2b71ee3a920113 SHA-256: 56655498a1db566caba2079ab0d0302ed84e2a8a54ff472ad09d35692e196f87
214 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 'traffking.ru', and another for a link farm with numerous external PDF links. The ML classifier and ClamAV also flagged this file as malicious. The embedded URLs suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=what+is+a+desk+zen+garden In PDF document text
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/52e1cc2f.pdfIn PDF document text
    • https://jivoxixipilekok.weebly.com/uploads/1/3/4/8/134885045/6392803.pdfIn PDF document text
    • https://pesegoniz.weebly.com/uploads/1/3/4/4/134497823/948649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f88f027f2d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_5fbc048abe719.pdfIn PDF document text
    • https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/jeredonina.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/2741618.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/635967.pdfIn PDF document text
    • https://tivakuwisol.weebly.com/uploads/1/3/4/3/134315960/tixewide.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/silubebebefuju/sidivavakejefurog.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/chessbase_10_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/70091375031.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/90317269743.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/rate_my_professor_com.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_off0000cb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1E 5184 bytes
SHA-256: 1ee92e0fa34862b55260d13ce4f5f62985b3abbe0b24dbc44c74757d497287e4
font_01_sfnt_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 10084 bytes
SHA-256: 06556e04cb3267fffb92c0600055733d2cce953d7e2cc0a285a82ed0badba48c

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