Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea229a588e1f78…

MALICIOUS

PDF

66.0 KB Created: 2020-12-30 16:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f27261f050a3a8f10d6c7d3d8fdaad8d SHA-1: 16d96c3a64fb2751bd4b1371d88811e97559a6ca SHA-256: 60ea229a588e1f787423d420444fc0be07721803e658d0291b2aacb94ab0fe1d
214 Risk Score

Malware Insights

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

The file was identified as malicious by multiple heuristics, including a critical finding that it links to known malicious redirector infrastructure. It also contains a link farm of external PDFs, suggesting an attempt to drive traffic to potentially harmful content. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=schedule+maker+rit
    • https://cdn-cms.f-static.net/uploads/4501198/normal_5faf5884e6dcc.pdf
    • https://vefenebef.weebly.com/uploads/1/3/4/8/134885139/210903.pdf
    • https://cdn.sqhk.co/nopawuwam/idic8g7/window_cleaning_business_start_up_costs_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4472186/normal_5fbdded23b66b.pdf
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5f9849b815e4b.pdf
    • https://cdn-cms.f-static.net/uploads/4446259/normal_5f9e4b3a4e1e0.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f89a140a1b7f.pdf
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5f9e21c444756.pdf
    • https://cdn-cms.f-static.net/uploads/4469365/normal_5fa75e1321c33.pdf
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5fdb9d1f45d12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f42aa04b-e732-4e3c-9aee-e1c93b9deaeb/ruvumebejilusekamatozo.pdf
    • https://uploads.strikinglycdn.com/files/ce11d46f-b7fd-45cc-a738-4bcc154e1033/sufugixoleribetebavuwujox.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c576.bin
1a7904bc70a02839e601dba45a5b10a35a05d032175891382e1b1fb7cf21339f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC576 5168 bytes
font_01_sfnt_off0000d6da.bin
c19496620a72434ec9f91a497ae12ac61cafbca1db4d9a1a73e49ce799f0e117
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DA 10720 bytes