Malicious PDF — malware analysis report

Static analysis result for SHA-256 45602ff515297361…

MALICIOUS

PDF

66.7 KB Created: 2020-11-14 01:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52649cc040613f91333f49e70f9359df SHA-1: 16d8e377cc6c8074685b84b4e02f6e66db906403 SHA-256: 45602ff515297361cb572aa94bd54d67131916d6e618ae877ffd5cd00e014f30
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://trafftec.ru/123?utm_term=mark+of+grace+outfit+osrs PDF link annotation
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/666714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f894a7682c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fa773243de19.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/5939531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fad5179f199d.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/gekagajoliwetimulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f9ebf6989ba5.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/b6ff5903695a.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/22b548ff-4030-44b6-a430-f0ca968aae5f/379th_bomb_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5805c407-c4e5-4424-bdd3-f5cc0b8db853/89449061141.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/dipij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9690de1-e745-4bc3-9ef1-53078563929f/power_electronics_mohan_solution_manual_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1328f2e6-fc76-4715-ac1d-f641b7972afb/moksha_edmonton_south.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64a2067-da00-46f8-9e32-6a4b2b4c29c3/54389149876.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_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 5084 bytes
SHA-256: cc4ccc760d4e027d047114a3a911429767a31e12053805feb11865ea1a65d628
font_01_sfnt_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 10844 bytes
SHA-256: 345c80071188586f284c4b1b5a61a65961cd8fbbb5ae0f1c6fe6c1e66cb25113

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