Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddb28626ae25290…

MALICIOUS

PDF

72.3 KB Created: 2020-12-11 03:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b63b68f6d6f409a8f8171229d03db531 SHA-1: 1e26e6496665d4935176fe174e0a86e6e200721b SHA-256: 2ddb28626ae252903a6d0b1f5227969e07bbfc69479796689d320e3d7a32d5ad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDFs, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URLs are the primary indicators of compromise, likely leading to further malicious stages or phishing sites.

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://traffine.ru/strik?utm_term=john+deere+116+service+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458421/normal_5fad29a66b2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f98f27f9eaae.pdfIn PDF document text
    • https://daviwajid.weebly.com/uploads/1/3/4/6/134609730/4534895.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/mexizirorazes-kozasixa-gasajom-tudipegupusam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fa99bb0f1ef5.pdfIn PDF document text
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/bd14d1ecffa5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f872ee2978a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8e4ef04ffb2.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/filizapele-vijisipizuwapip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529977/normal_5fc9b374c2f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fc2ae76814a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a325259f-a845-41b7-a187-28108676273f/mrt_dongle_crack_2.56_keygen_free_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af863288-8836-4c0e-ae93-9d6742575aa1/random_tv_show_character_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/018f689d-aa5e-4eca-8a87-d4ec4b7d4647/sokukowifamebimuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa37c5b4-2137-4d65-b2d0-3fae496c7bff/34992641103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f85b5d-46db-41a4-9a34-74b0aec9b6b6/5452058758.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1B 5452 bytes
SHA-256: d4fa1287fcf71e017c090fbcf16143cb11f5d4d53057f7f5634387ac1669d459
font_01_sfnt_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 10696 bytes
SHA-256: 556486851a28d6d1de8512de49540aa239303d8232a818b03724ce37252c60e5
font_02_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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