Malicious PDF — malware analysis report

Static analysis result for SHA-256 1175aede1a10a9f7…

MALICIOUS

PDF

81.9 KB Created: 2020-12-25 10:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b267e817c3dc82766c19213db10d7cc9 SHA-1: 5c1cdb3045d9baac6e0ed795009362a1a6ce57d6 SHA-256: 1175aede1a10a9f77b16c51c96c2440de900cf18d0d2a88d64420cef7158d62b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious. The presence of many Weebly-hosted PDF links suggests a coordinated effort to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=cops+and+robbers+minecraft+map+1.+12.+2
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/kinezujol.pdf
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/bimojovedezovaxe.pdf
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/sonifowu.pdf
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/7eb8bc36ab4f725.pdf
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/rafutinopulu.pdf
    • https://famudixapakowep.weebly.com/uploads/1/3/4/8/134855218/9eea6521.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/xijuxosisomuna/23728427195.pdf
    • https://s3.amazonaws.com/nisoxow/5966123700.pdf
    • https://s3.amazonaws.com/wudibirewuduto/jegisexexufekuzufozipekar.pdf
    • https://s3.amazonaws.com/jijari/27170304190.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/mixavuzanupawenajewetil.pdf
    • https://s3.amazonaws.com/luresimosip/98280535124.pdf
    • https://uploads.strikinglycdn.com/files/b4da624a-6799-4938-83b0-e3c8c69e7e06/telangana_intermediate_results_2019_date.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1e.bin
09973b5db0c444ba1b90d93be390e72a21fe26b4a63874bd8ddf4932ba263425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 5528 bytes
font_01_sfnt_off0000f0cd.bin
59f171de94486acd18d084ea39f41b2f98deaa99137525d90ac900b6a87cb516		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 5996 bytes
font_02_sfnt_off00010025.bin
d29b583e9fe96993575a09f3dad9cf2956eeed742b0bc8d5d2d633810c894f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 10696 bytes
font_03_sfnt_off00012509.bin
b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 16064 bytes

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