Malicious PDF — malware analysis report

Static analysis result for SHA-256 019f51b068f7e9ab…

MALICIOUS

PDF

59.0 KB Created: 2020-11-18 15:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e4bfd35db66bdf7e328d59faebdc5d7 SHA-1: 19701a36845d32ff0560a5bd3f0e4551775f584c SHA-256: 019f51b068f7e9ab1c681df77bbedbeb8e6c5379a6bf3982dc7d85c7444f1e7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely serve to redirect users to further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=cu+boulder+class+schedule+spring+2019
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/7740020.pdf
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/papimi-nefewekapojerof-vorur.pdf
    • https://perixezekawuxod.weebly.com/uploads/1/3/4/5/134504143/1632619.pdf
    • https://fexideraf.weebly.com/uploads/1/3/4/5/134529809/9759538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a659e4d-c33f-4741-9226-e43fe45cb45c/mifalo.pdf
    • https://uploads.strikinglycdn.com/files/6526184a-560a-457d-b419-fa0e53eab9c8/68553686269.pdf
    • https://s3.amazonaws.com/metakibeme/watch_joker_online_123.pdf
    • https://uploads.strikinglycdn.com/files/b8462c40-f2fe-4185-a05e-f23a0e852372/android_app_to_hack_bluetooth_speaker.pdf
    • https://uploads.strikinglycdn.com/files/595912c4-ec0e-44d4-b83b-cc2689ce6f59/81031935792.pdf
    • https://uploads.strikinglycdn.com/files/c39083fb-76e1-458c-b7d4-523d6b76faa8/zedesofusimajetebose.pdf
    • https://uploads.strikinglycdn.com/files/a7bbefbe-8a5c-4456-b382-67c0e27583b9/62767176935.pdf
    • https://s3.amazonaws.com/midipes/answer_them_tradutor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa63.bin
5f51d0d8b1ebe9892cc7cd6c23d933b79a56bbedb14c1cff5c549fbd06b37626
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA63 5860 bytes
font_01_sfnt_off0000be3d.bin
5f5fc58229344fc7c40217cd8be61374bdccd1dd189b6543fe13d5831e8781b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3D 9680 bytes