Malicious PDF — malware analysis report

Static analysis result for SHA-256 229e0206b27e900c…

MALICIOUS

PDF

74.9 KB Created: 2021-01-10 21:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 27c9173c39d21bd66357d053a5b84652 SHA-1: 56031e5469cc6fe4f91e993191cc94e8a7a7bfa8 SHA-256: 229e0206b27e900c7844adb2b5d44b9776d7fa0e1159b1b18370d7b24a4d6287
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or distribute further malware. No scripts were extracted, but the PDF structure itself is weaponized to redirect users to malicious 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://traffine.ru/123?utm_term=best+mouse+trap+ping+pong+ball+launcher In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_5fb274574a23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f89968063d90.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/PzhihaB/download_tower_defense_geometry_warriors_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/jghjjjj/64964594634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5fba36803c397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fc71e8d4208c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fae1c06aaadf.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/jjid3AD/to_do_list_template.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/1353718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5faed1b23e77f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f90cd583c0d6.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/cqheRAo/wh_smith_opening_hours_today.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/jeieijv/dhoom_4_news_update.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5536 bytes
SHA-256: f5d89db59de2f768daea62a99637d36a1f8c346066db52754f258165bc1901d2
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 10872 bytes
SHA-256: 9497bd0e347b90acddb23a16b7853d316dea95b54a1f2f769cf6b112441dea2c

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