Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7c356e0642359c…

MALICIOUS

PDF

62.3 KB Created: 2020-11-13 06:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb855f88e56930e74c2c94113c8b1cd7 SHA-1: 97ef82ce20222aba81ffba8c249285e1bf157a89 SHA-256: 7b7c356e0642359c7f7ee052cd8fdfece404b040908101aa5f9bb98cac487525
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 0.9997

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/aws?utm_term=jekhane+bhooter+bhoy+full+movie+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5fad6f59c8f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f9e1d2bb20b6.pdfIn PDF document text
    • https://zutafemaz.weebly.com/uploads/1/3/4/4/134478566/vamak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5fa618d0ccaee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f88a1e620bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fa4f7e35f93b.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/tetazino/xegozatikinajevumerewa.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/puffin_browser_for_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/25917570894.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/notary_public_acknowledgement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e47ec06-81e7-4a1f-bbdb-a94ef1f5c9cf/novo_testamento_grego.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pipedon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b15b537-d76b-440d-b93d-8554e615cda7/resident_evil_vendetta_full_movie_eng_dub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8606fa-41bb-4b55-a44b-338c5dfb2b7c/51674458275.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/mitosis_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5d69ff-6d6e-49b0-aed3-b7209e8b96da/21701083924.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/luxuraxikelaxafulovisa.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_off0000b85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85E 5324 bytes
SHA-256: 8b5115422bc0f607e1729db5677d2ffcf00ed7542a85680e55f0cff4fa000e76
font_01_sfnt_off0000ca5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5F 9916 bytes
SHA-256: 4aff91c48e9d783a79061193131ea493b8cf785b976285b0b88b86e9c1d4f464

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