Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6996073e210d6c…

MALICIOUS

PDF

65.6 KB Created: 2020-12-21 05:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3aca1d0122925b86b142ee0502dc22b SHA-1: 164c26f72b71ee68ad7cee43b56ff78fddb6e4cf SHA-256: 5f6996073e210d6c9416d80e1e83e01f3db7c7a5aaf1e825aa40e72ddf04b12a
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is disguised as a Netflix login help page. This, combined with the 'Urgency Lure' heuristic, strongly suggests a phishing attack. The ML classifier and ClamAV detection further corroborate the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=netflix+nz+login+help
    • https://cdn-cms.f-static.net/uploads/4485162/normal_5fd75d1a28174.pdf
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5fb46e17ef083.pdf
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8a11d8587de.pdf
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5fcc742033a3d.pdf
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f9d03e326b0a.pdf
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fda8e9e63c91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/39b56573-addf-419c-9ed4-f7b107eb1796/pufuvumibuxunakafof.pdf
    • https://uploads.strikinglycdn.com/files/805a4da7-4538-4892-98c3-825e4df93fe4/pug_poodle_mix_for_sale.pdf
    • https://static1.squarespace.com/static/5fc0be4612facd59ceac2d5b/t/5fccfb229aa2de0c6495c730/1607269154805/loponezefewijizefi.pdf
    • https://uploads.strikinglycdn.com/files/4dcd5c43-f4ba-4c52-a9a1-6c91307cd73e/4898424119.pdf
    • https://static1.squarespace.com/static/5fc328402e537a05ef17c917/t/5fc92c7adb5a265f5af313cc/1607019643679/pijag.pdf
    • https://uploads.strikinglycdn.com/files/f8afc0b4-73bf-4243-b6ec-6bb007ead2d4/star_wars_the_old_republic_leveling_guide.pdf
    • https://uploads.strikinglycdn.com/files/6e4985bd-ace0-4d02-b114-d1fb1cd88f09/dodagim.pdf
    • https://uploads.strikinglycdn.com/files/17f46549-2e8a-4863-a2a0-f6812c09b58d/fixulevukurofew.pdf
    • https://uploads.strikinglycdn.com/files/b3d403bd-bb91-4e73-9ff1-3e1f2d93c342/62517443791.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_off0000c5f1.bin
c81633931c0d8ed1fa38c17e0531957595b3136e2519d184f08fd016bf0b2bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F1 4764 bytes
font_01_sfnt_off0000d643.bin
0c5ed7e7867e1391e6c5ac01a81bb45a5b5034ece153467d121288dbc274d7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD643 10448 bytes

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