Malicious PDF — malware analysis report

Static analysis result for SHA-256 e025a1756b06b3fb…

MALICIOUS

PDF

94.8 KB Created: 2020-12-24 17:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f119fffdff333fb9ad80f3ae1e9ca47d SHA-1: 9d91558fa015fa5800a4458efa1b112e3b3aaeb5 SHA-256: e025a1756b06b3fb27c2a9e5131b6557463b2319df2f8b7b2991c06ed82fe7e5
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=my+planet+fitness+rewards In PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/0f5c2d42c56efc.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/87b748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f937c134f801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_5fa289373d0b8.pdfIn PDF document text
    • https://xaxiduxaze.weebly.com/uploads/1/3/5/3/135308656/44346184b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426071/normal_5fad53ecbd98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fa530ad484b7.pdfIn PDF document text
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/df44da7fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fb7c5165e84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fdabd4f5a38a.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/kudefem/jobavaziselozovigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0a31e1-3eab-4e4f-aea7-949696a2c5eb/37164063661.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/hobbs_and_shaw_watch_online_free_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/catalyst_athletics_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/psychology_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/pathfinder_dervish_dance_build.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_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 5232 bytes
SHA-256: c1cab6650ca0c94cdf097041d2aa95234f1485a8f4e0bcd3ea0aaf71d52a80ee
font_01_sfnt_off0001454f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454F 12004 bytes
SHA-256: c8bffa3ec314ca470f11d18e3276fbce7848eee810a385488d39199f39381d03

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