Malicious PDF — malware analysis report

Static analysis result for SHA-256 6960778b9ce98548…

MALICIOUS

PDF

70.2 KB Created: 2020-11-22 05:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ee1af7238af7bb3e78d05571b4cde43f SHA-1: 580090da1f3dcd2baf433d1e0c2e3395c80fabdc SHA-256: 6960778b9ce9854840df232edaf49101b0235e6324f6d2edbaebcf29f8c57661
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=scratch+2.+0++linux PDF link annotation
    • https://nizozunolo.weebly.com/uploads/1/3/4/3/134396810/1709679.pdfIn PDF document text
    • https://pamonufurudanes.weebly.com/uploads/1/3/4/6/134621962/ruzumopemoka_pemuwuvabeno.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/gawalok.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/kokivu_dejelilefadab.pdfIn PDF document text
    • https://femimujuzo.weebly.com/uploads/1/3/4/6/134640298/sukipovidut-misurivaseta-fadimumakula-dagoro.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/f38f9fe283f5d37.pdfIn PDF document text
    • https://wugovokida.weebly.com/uploads/1/3/4/3/134319073/31b6bd33538d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5f9f2738c1753.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/visewelef.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/f2733133-f3ab-46aa-b7b7-2b3e403883c7/veresulizexemisamejuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564a5fb8-fe9c-44dd-97ca-ca9abc859842/34243140844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137d9afb-b283-46ee-a78f-448588feeb82/hot_wheels_highway_35_case.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_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 5184 bytes
SHA-256: 4d04c85a078b96338b8eded9631be9d7a40b7dbf0d3f0581b20e4b42f4723191
font_01_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 10740 bytes
SHA-256: 2e0efd73bd995fd9aa20cd7ef8c5182a5bd64f7fbfd0ea19364d01ecd0ca98d4

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