Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd5148c585b908f…

MALICIOUS

PDF

82.3 KB Created: 2020-12-21 11:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08a0feeef7ed26c20b242f01006a23c9 SHA-1: b2e7cce0c20c134d408827aa816270dbde62cf20 SHA-256: 8cd5148c585b908ffc9ad1db97a916a55c5211c4fa0bc9fd6d975e796fea1221
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded URLs, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The document body appears to be obfuscated or corrupted, but the presence of numerous external links suggests an attempt to lure users to external sites, potentially for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/strik?utm_term=metaphysics+aristotle+pdf
    • https://cdn-cms.f-static.net/uploads/4462980/normal_5fb8ef9712b89.pdf
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fda2e990d1c8.pdf
    • https://zifizegesug.weebly.com/uploads/1/3/4/7/134719454/bce800dfd2.pdf
    • https://wuwawibef.weebly.com/uploads/1/3/4/6/134608234/pofewi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivala/crestron_flex_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/891137fc-6020-427e-8b53-715ab789b1eb/xubagejezix.pdf
    • https://uploads.strikinglycdn.com/files/61ad7105-0717-4020-95a1-3f3a5b939e06/49241530157.pdf
    • https://uploads.strikinglycdn.com/files/7c5a4346-42de-4270-814f-f57f61cb3ebd/john_lash_not_in_his_image.pdf
    • https://uploads.strikinglycdn.com/files/a74f7b9b-4eeb-4055-b6dd-0cbbc208fae7/79582368798.pdf
    • https://uploads.strikinglycdn.com/files/5be3c46e-3073-4457-bbd2-99fe97f0a9de/cedar_hill_isd_jobs.pdf
    • https://uploads.strikinglycdn.com/files/970fde8c-77ae-4171-844b-a37f2ef51bfd/working_in_groups_6th_edition_free.pdf
    • https://uploads.strikinglycdn.com/files/52b6c30c-4188-40ed-914e-0d109436846e/bediwajilafefadipidu.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_off0000fa37.bin
40729f28277887c118f21af7861522531702bc10713e97d71a7cdabde716d182		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 5352 bytes
font_01_sfnt_off00010c76.bin
aab0c6c98c5a280893fdaf16eb252d053cad84b595c5ec437f444b82b9f8cec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 15584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.