Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d351de63e690a1…

MALICIOUS

PDF

86.5 KB Created: 2020-12-25 17:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300d78d07c28b2a35359ca25491c1072 SHA-1: 5e58fd2b010154f1a5c569657838ab02a38a04fb SHA-256: b2d351de63e690a11908fe4321f71dd9b94b74c24a9f5561e7934e0e06ed7f8c
154 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 likely intended to lead the user to download malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely part of a phishing or social engineering attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=geometry+dash+world+download+free
    • https://cdn.sqhk.co/mefomixut/ghd95if/jefikizogokolupamabeg.pdf
    • https://cdn.sqhk.co/fojufifef/gjicw2j/56154911810.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f8727ff40b1f.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fad7e2997785.pdf
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5fa77ccd0cb80.pdf
    • https://cdn-cms.f-static.net/uploads/4493200/normal_5fb9449d2f6b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/janodojivi/tiroxoxavimurokuxez.pdf
    • https://s3.amazonaws.com/juliziwojatige/sosuw.pdf
    • https://s3.amazonaws.com/dazuxujepov/assassin_s_creed_unity_ps4_error.pdf
    • https://s3.amazonaws.com/nokiva/56221107840.pdf
    • https://s3.amazonaws.com/xulepiwa/notepad_for_ubuntu_18._04.pdf
    • https://s3.amazonaws.com/jamokaroxoj/watch_bumblebee_free_online_no_sign_up.pdf
    • https://s3.amazonaws.com/tuzamada/jefixewadad.pdf
    • https://s3.amazonaws.com/jevelel/21459106584.pdf
    • https://s3.amazonaws.com/povodijirig/google_chrome_web_browser_free.pdf
    • https://s3.amazonaws.com/fakuguvil/71696561138.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000124d2.bin
969142404a1f2e46386c864e1542eb83fdc72fea3938c1943ce849253d0812e4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x124D2 22528 bytes
font_00_sfnt_off0000dc30.bin
f89851c503be38a74f0186998e3658527e1b8c39353dc822d86b1c1a98b181ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 3016 bytes
font_01_sfnt_off0000e6f5.bin
29ed3acd968f81a88c0d6b3d8547aeacb74da752e7191cd63e3ed99959049687		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 5372 bytes
font_02_sfnt_off0000f91d.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 1800 bytes
font_03_sfnt_off000101aa.bin
dc26fe29ae51c290fa4f2a8712f2aebe98f542c084eb1202ee8a13be00f6dc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 10180 bytes

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