Malicious PDF — malware analysis report

Static analysis result for SHA-256 163e75a3bb79ad0c…

MALICIOUS

PDF

71.5 KB Created: 2020-11-22 16:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a708a917c87ec324a824f495d04557c SHA-1: 90dd8a3616585a23d9b7ba46295b23a2098c55e3 SHA-256: 163e75a3bb79ad0c6fc288f6f546ccb639b446e07c9b901fab497e5e56ac551e
196 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. It uses a password-protected-archive lure. 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 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=argos+online+application+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5fa9ddd9562c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fb68885ab75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_5fa1bc6fd27f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fb7f23bbb2b1.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/bf140ddb23be50.pdfIn PDF document text
    • https://jilanuma.weebly.com/uploads/1/3/4/5/134522828/gogekedawezeriseve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/model_car_wholesalers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfd3954-f10a-4285-bcff-22869e914347/2436869234.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/24_oras_april_15_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fe0824-2a48-48e6-93f4-9b4c164727ad/xujuvexoborevixip.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/41654563007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabbd4a0-cf2a-4b34-9555-022fb712ecdb/2521016110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188a0edb-112b-43b8-907b-afbae235d49e/catalogue_marjane_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffe27fb-c946-40d6-b126-922ef844c2ad/cooper_dfp450w_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 5324 bytes
SHA-256: 659e25d6d9d395bf1fab1223e6e92a1772816d67ecbe12b7ad43d37abcfa683d
font_01_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10252 bytes
SHA-256: ca9309b33919300dc0da47d964499687a38170ef43f6c8e28e8b795e7edd24ca

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