Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aea1d459b2ed387…

MALICIOUS

PDF

71.2 KB Created: 2020-11-17 07:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f4e61845fa1c8f17fccdaf45cf22f0c0 SHA-1: 9b806172290ec5397dd7f9e630c56805770b8b4e SHA-256: 3aea1d459b2ed38761b96ef4b22568e4660f01e14e3dd47a018a44e74d72e48a
156 Risk Score

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/123?utm_term=morrowind+load+order PDF link annotation
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/zimikobo_lolal_fosovonebeb_tanawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fab375dbe394.pdfIn PDF document text
    • https://lupilizeranal.weebly.com/uploads/1/3/4/4/134460298/butujonezuvalibi.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/figugipopar/manitowoc_county_warrant_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/63506085826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d6a8a39-23b0-4762-a76b-e22f195b9b82/fozipodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/luvamekonivoz/dujefe.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/49680524179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48df805e-a2bf-4bd0-b8cc-3a8b60bfaeb0/40403381444.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/alex_from_ready_to_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d17774-e2f1-41b8-bb8a-59042a74b9ff/larajutadurirotub.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/asepsia_y_antisepsia_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/kixunopipidekuvulirokega.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_off0000dc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC27 4736 bytes
SHA-256: 971dcac152bd0bba75e06efde17e7680ad83c86f5c81bf09ba0956138abacb06
font_01_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 10540 bytes
SHA-256: 319e0c247b95e69e6295eb1aaa8349e206e0c98ab7d0d1ed9e0f652b6bd58549