Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fee602e7f48c31…

MALICIOUS

PDF

70.7 KB Created: 2020-11-19 04:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f2b38ac905c2f6b266f7e6b81c850993 SHA-1: 2292e7c28c12b0254a097cfda72bc2038b9f3225 SHA-256: 30fee602e7f48c31db1b0d201a8f36cfe150e226796458e129ac9f9ff0d174eb
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector link farm. One of the primary links, 'https://traffine.ru/strik?utm_term=scie+a+buche+gaubert', is flagged as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple links, including one pointing to a known malicious domain, strongly suggests a phishing or redirection attack.

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://traffine.ru/strik?utm_term=scie+a+buche+gaubert In PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/bugege_soxowi.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/3440429.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/xavaremafaxi.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/wobokovukomat-veramepemif.pdfIn PDF document text
    • https://soxupewo.weebly.com/uploads/1/3/4/3/134392520/bbb962a4.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/f2179a5f8cb655.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/mejawiwomak/strength_of_schedule_qb_rankings_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/winter_2020_anime_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/31989249127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705c2a7f-1b70-4659-b1c3-eb877cd0be83/56986422857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824d5291-d53f-46fc-a0f0-61ebf8550921/69352880287.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/danny_trejo_net_worth_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/vepawuxobak.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_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 5096 bytes
SHA-256: a4f3e14efa3fc354e83b42c1ef7257b0e5cbc25d99aac438bc5e3352318a1b0f
font_01_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 12944 bytes
SHA-256: 6060a77c150419526807759e6783f4dd72ac217665a4c94a57ae5fa763a4f283

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