Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5311c7aa544a70…

MALICIOUS

PDF

74.5 KB Created: 2020-11-18 19:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2b9c402fab92ec52a476f5e0e3726aab SHA-1: 0fcde01eba56d1fa4e2b87e132259df2085b67f2 SHA-256: 9f5311c7aa544a70db03e4916e5b1ff2a7828188cdab9e23f415378ff8965edf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=photography+contract+template+south+africa PDF link annotation
    • https://genovaxoduw.weebly.com/uploads/1/3/4/3/134388418/96c0ba509e8f9d2.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/munifojuxexapewux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_5fb3fbe3793e6.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/0a3d7442fdd232e.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/jibutunutesinidinite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f935873b6702.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/8fbfde60-0608-4384-b833-5628380bab91/teforixomokokesikemugari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abc936f-40e5-46be-82be-82bc380aea28/wolimodedunipe.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/the_world_s_easiest_game_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b9e3ea-09ba-4bbc-9130-4786a6f13200/gawatilibeganinanulujur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b974d7-c707-40e7-a7ef-e7a0aa54f0c7/kemawekenijaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f9b1fc-6c87-40cb-a3d7-e0d95d217c27/35541857139.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/simple_harmonic_motion_gizmo_answers.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_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5532 bytes
SHA-256: 6a3e7111e7322d6d225d91861b3b11fad33f2abb3e2aa4a136b29f05a2f254f8
font_01_sfnt_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 10500 bytes
SHA-256: 76d8b4c95e9d308b9eb1f1fdec4c272ed6d8d4f5caa069155a354681a1cb4de4

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