Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6446e9fb961ef6…

MALICIOUS

PDF

67.8 KB Created: 2020-11-29 21:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e5cec74da51baa784c97df50ca52be1d SHA-1: d3140e46b078d83290204b0dc2a09548208983a9 SHA-256: 7d6446e9fb961ef69c5b7dc63a69e60ecb38a06e9922d925c23efd3ff28c5087
96 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 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 4

  • 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://traffnew.ru/strik?utm_term=animal+cell+diagram+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5f98596ed81b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_5fab1786edae9.pdfIn PDF document text
    • https://wibarojadika.weebly.com/uploads/1/3/4/6/134689619/solimako.pdfIn PDF document text
    • https://sipopupomiva.weebly.com/uploads/1/3/4/3/134307082/kafimibasurederi.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/f6121ac2-fa7e-42f0-8793-1b66ef14e993/rusojozibajibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63de7f6b-8c1a-4b11-9ee5-570219a80d3b/periodization_training_for_sports_5t.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/62356759658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aefe644-77fc-498e-97f0-e28cea2b779d/bojigaxakiretirezesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c836a0-c231-4d13-957a-1384f9c915bd/samsung_galaxy_grand_prime_update_so.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714e4aa8-a0aa-4802-a88f-15f13d4d17e5/77991511549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cea0be3-550c-48bb-8ac1-b94b349842a1/kamojepovusutotawosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f31ba38-b6bb-48af-8075-6cc2383fa35f/vukazu.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/91975354014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc37b8ee-2637-424c-a695-6feb92f5822f/above_top_secret_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203e51f9-7b6e-45ad-b44f-c1e7ced3aebf/97230525088.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_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 5496 bytes
SHA-256: cf19e181a0512b38e5069eb4c6ac2865d6d8b3c08aa49a80e6ea893248d3f913
font_01_sfnt_off0000de74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 10476 bytes
SHA-256: bc29332dfb75a70a976200d520c5e15285f48db4eaaebd563a9073269f786d64

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