Malicious PDF — malware analysis report

Static analysis result for SHA-256 219d604d7fbeaf2d…

MALICIOUS

PDF

66.5 KB Created: 2020-12-11 06:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a955db92a655c701161eb0cf7aab33a8 SHA-1: 90c2fe73d6fd677f3b7d2718790066ad9db1f508 SHA-256: 219d604d7fbeaf2d0d142dcfa35bf414522c7a08f972fc32deea0b7b645cba7a
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://trafffe.ru/strik?utm_term=the+power+of+six+audiobook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454429/normal_5fcef5bf8bb9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f91e2f82e442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f9e8d5f661f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490515/normal_5fb4aec2b12e1.pdfIn PDF document text
    • https://kerixigepib.weebly.com/uploads/1/3/4/2/134235482/ditipataparorimoroka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fb2bb95eba33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fc1fa680915f.pdfIn PDF document text
    • https://jifemeput.weebly.com/uploads/1/3/4/3/134398411/d7c0e79dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_5fd2d812754b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_5f9bbd69955da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fab0d4f90084.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/447cb033-4a97-4bb3-937a-53c57da85fd1/tuxumawuzesipope.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc342d33485235c86305afb/1606632148207/cypress_valley_canopy_tours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ccb8af-6098-46f9-9fe6-4094c6f7a254/jijovizilomesasonuku.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_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 5408 bytes
SHA-256: 69f393af98750beadcb3ffb7ef9af031c182e223d8fd6ad60869fa7e1f00b743
font_01_sfnt_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 10676 bytes
SHA-256: 49c796cd05925fe7b5d51448b66a5b50be567b9d1e335e01fe4d53dec1422820

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