Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea0fcf7a690dd34…

MALICIOUS

PDF

67.3 KB Created: 2020-12-03 06:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a48bda99be974079838ff9a4a9eb4ca SHA-1: 1e859c4cb86729292bbb6c71c33c6ab6e2dd1e7c SHA-256: cea0fcf7a690dd34ac7c28f8d6c18aab0a24ad0da252f2dcfd3dfd83a241e666
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain a lure related to a quiz. The presence of multiple PDF links suggests a link farm or a method to distribute further malicious content.

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=what+furry+character+are+you
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/xupop.pdf
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/derobu.pdf
    • https://nupadosizekibu.weebly.com/uploads/1/3/4/5/134597568/9fb4ef9876a79ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/belopudevuzuza/45345408724.pdf
    • https://s3.amazonaws.com/tarizirefevifab/female_sports_reporters_uk.pdf
    • https://s3.amazonaws.com/vuraradaso/retonojaxagevetapi.pdf
    • https://static1.squarespace.com/static/5fc11fbabe9b6939510c2240/t/5fc6733408845d0924694313/1606841141443/teddy_bear_wallpaper_hd_full_size.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfea272f8b574a0f3b387/1606221474996/93883105168.pdf
    • https://s3.amazonaws.com/jimugivos/nesexidamimagu.pdf
    • https://s3.amazonaws.com/rebomedug/tolekunupepasov.pdf
    • https://s3.amazonaws.com/pusori/laxetaj.pdf
    • https://s3.amazonaws.com/kavugusepe/64603978700.pdf
    • https://s3.amazonaws.com/luramamelolem/branding_identity.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b74c.bin
c6b95c43468583743d9fb46089bc6ca71fc3459ffb1f9d8d67ba59562c845085		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB74C 4876 bytes
font_01_sfnt_off0000c7f3.bin
f8a9cbb3bb453048d1c1e82426e365396ccf83ed64b3f00d60b41e1b0c280d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 10144 bytes
font_02_sfnt_off0000eacc.bin
3e87fad28d37f7c26fe9b6c98b72eef6254a1ac4f0dc4a6d5eda26f806d2e8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 16180 bytes

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