Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c720d9ab9ad4b8…

MALICIOUS

PDF

73.9 KB Created: 2020-11-12 17:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1996efa7300b55284e014c9c6978843 SHA-1: 7ea7949781beba37425d2a3669a81ac205228386 SHA-256: 04c720d9ab9ad4b8b7cf3004be77ae8f327bbc1ce8fc3733052ec8257f9640e9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=1440p+on+4k+monitor'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=1440p+on+4k+monitor
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/wafuri.pdf
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5f991505e8ff0.pdf
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/4235841.pdf
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/9036793.pdf
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f9b969740264.pdf
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f898f8af00df.pdf
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/pumazalatopo_rovukowonufe_zozifawub_xiralixirepoz.pdf
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f88a8b180822.pdf
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f8c9637158b1.pdf
    • https://cdn-cms.f-static.net/uploads/4460266/normal_5fa56c0003121.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b8420bbe-a6ca-486b-8f62-0197112a16a6/vumejed.pdf
    • https://uploads.strikinglycdn.com/files/bbeef022-9c8f-44f0-b920-9dd7a0fa0ea1/tuvukasorozusone.pdf
    • https://s3.amazonaws.com/buponuwebi/jesus_teaching_on_prayer_in_matthew.pdf
    • https://uploads.strikinglycdn.com/files/fc9ab916-2d20-40bd-8437-be9db321c245/jizijalipisu.pdf
    • https://uploads.strikinglycdn.com/files/3851bbcc-50bd-44b3-b408-786a8fab4d3b/45236205072.pdf
    • https://uploads.strikinglycdn.com/files/e84602a0-2c76-45a6-a045-21fb792365c3/demufu.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_off0000e43c.bin
4e2976ab7897b0515ed0db430cd052ff5dc63bcdbb0bdff21ca11f462a57257d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 4796 bytes
font_01_sfnt_off0000f486.bin
0cf9ca8442ace7cea0196be8ae74b421ac4e41447ed0169f71a88eef1162edca
pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 11416 bytes