Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99c6954ccc49ad9…

MALICIOUS

PDF

65.9 KB Created: 2020-12-20 19:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918b9032e0ecc25e88ee9fcc95c6e0c9 SHA-1: 1723b2aa9480af6a8cdccd44868e6eed78819ea1 SHA-256: e99c6954ccc49ad93896d336af7a209ee552447bc0732741b76ac68adf024059
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one identified as a potential phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=the+rest+of+us+just+live+here+synopsis
    • https://cdn-cms.f-static.net/uploads/4490539/normal_5fd96f3d4fb39.pdf
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/4777074.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/5247480.pdf
    • https://cdn-cms.f-static.net/uploads/4477649/normal_5fb4104f9cd2a.pdf
    • https://cdn-cms.f-static.net/uploads/4403565/normal_5fae2f372f5c6.pdf
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/dupilowogupitit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55e006a3-2c9d-44a5-93b5-358e74237a35/26243006788.pdf
    • https://uploads.strikinglycdn.com/files/eec623ab-c31d-48ab-8d37-1cfb3bb1a8bb/lil_boosie_do_tha_ratchet.pdf
    • https://uploads.strikinglycdn.com/files/a017db0b-1575-44a3-9ea1-39d81d8cefb6/ciaa_covington_tn.pdf
    • https://uploads.strikinglycdn.com/files/cb287081-54df-4705-9c9a-ebcf6b16f2be/apa_standard_of_perfection.pdf
    • https://uploads.strikinglycdn.com/files/014a4a42-fc66-476f-b814-b6992c8e210c/94130269364.pdf
    • https://uploads.strikinglycdn.com/files/21e9242f-f136-4986-a187-8adfd1b341a6/97375727351.pdf
    • https://uploads.strikinglycdn.com/files/cfdf5a0d-d89c-4823-8432-b6720debdff9/vizumugos.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_off0000c7a0.bin
92cdac6c3961e830bd8df42a5d01e412c1587b496b3d8eabc3d87a72a98a411d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 4964 bytes
font_01_sfnt_off0000d896.bin
5f60288ede0cb96bf059a66b188c282a39443806441bde4994fb8a82c5a51691
pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 10024 bytes