Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d62dee5938aa1f0…

MALICIOUS

PDF

71.4 KB Created: 2020-12-26 18:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e89638e9401ad273bc7c60ee5e603f45 SHA-1: 642e647ae9ccb1728a96adf51d45deaf7f75b0ee SHA-256: 1d62dee5938aa1f0bfb61fbe2c3feb6f95ebbbeb48159caa8f33ba14497e6cdb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in link farms to drive traffic or distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffset.ru/aws?utm_term=writing+in+scientific+notation+worksheet+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417308/normal_5fc688e455b43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488810/normal_5fc84660291b0.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/Kihnlie/wesebolinodoperajikefono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fbb562473dfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_5fae2f520b9c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483331/normal_5fac4ceb2bf0e.pdfIn PDF document text
    • https://jimurapixow.weebly.com/uploads/1/3/5/3/135399705/jepirogakolemowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f8e48c1f4161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5fbfb64b68caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5fb01f0529a04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fd1b18dbf3d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/953a009a-c40f-4312-bb1d-578d9c2e7a1b/52869268009.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_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 5384 bytes
SHA-256: 0de28dff62a303db3fc7007978bf8ce66b7ddc1253aa09c2761eb3ca36bf987f
font_01_sfnt_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 10684 bytes
SHA-256: 4ee92023f8a74c79b5aefe26d0fdac3d5149ad520d3083dd6bbb683f2c650764

Open this report in the interactive analyzer, or submit your own file for analysis.