Malicious PDF — malware analysis report

Static analysis result for SHA-256 47171f118a3c359a…

MALICIOUS

PDF

64.4 KB Created: 2020-11-11 22:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e496f7af6e8de6642405d8be6d35df41 SHA-1: 1e5c6c0e2fd95f87c709d34b599c15bb7aad1ba7 SHA-256: 47171f118a3c359ac722fbb295fc78e8f0e4d08fa4e5d20d955598ef23bf03d2
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains a significant number of embedded links, identified as a PDF link farm. One of these links points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=laboratory+manual+for+anatomy+and+physiology+6th+edition+exercise+2+answers
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5f9620f70962d.pdf
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/posukufirijes_jakuwi_mevok.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8968e0ecf3e.pdf
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f870a89554b2.pdf
    • https://karojigulad.weebly.com/uploads/1/3/4/6/134623473/1f1f0.pdf
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f87b9f92e6b9.pdf
    • https://zuzigiwasozobe.weebly.com/uploads/1/3/4/6/134676944/gogum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f376a6e3-d14d-4d64-9d93-246881775b09/descargar_el_agua_champeta_mp3_conve.pdf
    • https://uploads.strikinglycdn.com/files/dddece65-ff10-49f0-b0a2-dea3534abafc/povo_de_reis_assemblia_santa.pdf
    • https://uploads.strikinglycdn.com/files/88393a7b-e4e0-4a60-b284-e1a70398b4c8/sao_integral_factor_reroll_guide.pdf
    • https://uploads.strikinglycdn.com/files/173d0664-a30e-43f8-94a1-c26f4fc6e025/delusodeni.pdf
    • https://uploads.strikinglycdn.com/files/c5615354-2ad4-410a-9d9b-a40ee1ee914d/duwujogo.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_off0000bcd3.bin
9304c402cb55f7dc45564eeba7ae8e4cd61e916f07e71ff8989e6a0f5fb5e42e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD3 6196 bytes
font_01_sfnt_off0000d1e5.bin
2e9ecf3c8136ece837a4f90343fae0a665edd24232bc4e25ba6daebec5ce35ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 10028 bytes