Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae9ca1a17b46fe3…

MALICIOUS

PDF

68.4 KB Created: 2020-11-25 01:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b7fc0314f1509bd86ec80a5126a97002 SHA-1: bdfb3e7349505c4f1689f1f9e2b5d2eb0a19dbb4 SHA-256: 0ae9ca1a17b46fe3eacc8ef6a42a75e4fcc385767b5d14cac16a3ed6d02e6cf3
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=burnt+offerings+pathfinder PDF link annotation
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/7348747.pdfIn PDF document text
    • https://julitigifoxa.weebly.com/uploads/1/3/4/3/134310533/dexudijopoled_wowalobara.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/649a725a-fb76-488c-9cc4-b67169e1eda4/31426527341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14ea08e-7f0f-4f6b-9c9f-4dae70083a33/rainbow_rowell_carry_on_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523d0fe8-933a-469c-9b42-4f4a5170a8da/conversion_estrella_delta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a573a91-8912-4b0a-8a5b-bde455421566/dujikunamononiderofe.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/crown_of_sorrow_raid_exotic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63574307-de3c-4b2e-b24d-fd81eb454a3a/22887868380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822e4e9c-2bca-4aae-aff0-70fc85af7f52/91664876066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e697b2d6-c555-4412-b1ba-35265bd0dffd/handbuch_zur_deutschen_grammatik_ans.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_off0000d020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD020 5320 bytes
SHA-256: af88be926f0c25f5dda54c98a86d6518ced06978cce97583ce72d8c233bafa17
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 10324 bytes
SHA-256: 88358e2b5eb5ca3ec3fa9d11aab0fc6302f0941af28877aaaac1c1f5327ed923