Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2606a10d2ce867…

MALICIOUS

PDF

79.2 KB Created: 2020-11-13 12:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6f49dff9742d692da824aec5a3ad9207 SHA-1: 367169895174a7db6b1d6f46d4727fe3b88b5d19 SHA-256: fa2606a10d2ce8676d3f131e9bc4218a2aa3a1ed0bfc7a82fc68fd7dc504c3d0
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link and numerous other PDF links, suggesting a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, contains text related to "packet tracer commands cheat sheet", which is likely a lure. The presence of a malformed exploit stream and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/123?utm_term=packet+tracer+commands+cheat+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5f8b33deda027.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/8e1b63621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f9342c9396f9.pdfIn PDF document text
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/ef7edd566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_5fa97896cdf8d.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/bda029b635.pdfIn PDF document text
    • https://cheatography.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wavunot/broncos_vs_jets_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5730c2-7c08-4862-b463-4faaaf0a94ab/44943628784.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/sinuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/59388045924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9576c9cb-4d2a-4f61-a54e-8281639aec40/tewodilakofesiluzagebida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2deef1cd-9c14-40d0-ba8b-af1e27652117/kosuz.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/kogaguligulomilatazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9ae094-3f3f-43e4-a368-2d3c440261dd/70402880175.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010514.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10514 24656 bytes
SHA-256: b349ab2f96225a6b99ff45dcb8d0395ce024ab27725d13c353ce4dd75b55c69b
font_00_sfnt_off0000cf23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF23 5212 bytes
SHA-256: e12d1b8eb59d85edb5e13d6664335130eb6894068f1eea1c10f70968a343210b
font_01_sfnt_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 10572 bytes
SHA-256: ffbe06d4330e055593d4c41bb6ece2a41933b19e6135e81b4e8fe174f6bdb04d

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