Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2f4cf349515021…

MALICIOUS

PDF

68.0 KB Created: 2020-11-09 19:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 43e8e5de361b6ed9b83dcc8277c7a05c SHA-1: 93b4002ee0d300bcd0f1c546cb4ebb8a1f047f22 SHA-256: aa2f4cf3495150217cea68be10c151bd745c1ba30491716400bc256620e4362b
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://trafficel.ru/aws?keyword=dash+1+pint+ice+cream+maker+recipes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f97d5f979556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f8d0fc83c7cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fa0bd0b31542.pdfIn PDF document text
    • https://mumevifovamix.weebly.com/uploads/1/3/4/4/134486033/b58437c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5f9494f393bc4.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/07b50be3-a412-487d-a372-35318a9739bd/bloons_tower_defense_5_unblocked_hacked_666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d18ba6b-59fe-405a-b56c-54489c8e4565/jabekunabafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d89f8d2-3f29-4136-9324-41e49edb6f09/jikiwevuzotatafoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04356f4a-a94e-4ce3-a917-a203da625a0d/do_dargyns_spawn_at_night.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da1b846-ad5c-49a0-905e-a61b7e1cc0f7/wibalonewupuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19068ba8-09b9-4155-9c72-4a602816f75c/lucario_and_mystery_of_mew_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd5d591-7f5e-482f-b419-55c0bb6eda7c/94305288132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e547de0-401b-4859-878d-396a0b9439a2/letter_of_recommendation_for_a_pastor_sample.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 5256 bytes
SHA-256: 7f5970069eafbcf6e85a59df683b1eb743be1da111eccca02ee54c15c797db62
font_01_sfnt_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 10436 bytes
SHA-256: df84ba19dd7bb6e6f506f56c55b794e647abdf9defc3c022285104dbd32d98de

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