Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bc805408468be1…

MALICIOUS

PDF

63.2 KB Created: 2020-11-13 11:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d5c3e9bc281a4c4877613dc1c7c2bef SHA-1: 1ef2e8d36219d19d03d13ee134bdc0e433d36c65 SHA-256: 15bc805408468be1d52b36414eebf32edf51bf30cfed118cc5cb7e83e62316db
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The document body, though heavily obfuscated, appears to be a lure related to 'unblocked games'. The presence of multiple external links suggests an attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

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.
  • 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://gettraff.ru/123?utm_term=fleeing+the+complex+unblocked+games+77
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/53bc0a86556.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f87d79fc71ed.pdf
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f91df3885c96.pdf
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8cfc7a76d22.pdf
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5fa02581ccb74.pdf
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/finuvavubabu_jiwigo_buwun_watik.pdf
    • https://cdn-cms.f-static.net/uploads/4428083/normal_5f9bae196f18b.pdf
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f9d433404647.pdf
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f9ef64edce76.pdf
    • https://cdn-cms.f-static.net/uploads/4486772/normal_5faa56bf32cab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tadovu/82472859983.pdf
    • https://uploads.strikinglycdn.com/files/f03ad7b3-10e1-4e9b-a461-a130e5c4f56f/64188809293.pdf
    • https://s3.amazonaws.com/setaxilitozuko/44314545571.pdf
    • https://s3.amazonaws.com/gewuwasi/ibis_paint_x_download_pc_windows_10.pdf
    • https://s3.amazonaws.com/vexosafugunu/vubejugamusalubiki.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_off0000b924.bin
e83a7e521b01bc1ce99422ecf356b289a6d5b5e24bd852710d403628c16c73ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB924 5696 bytes
font_01_sfnt_off0000cc73.bin
545640638ab2301b04f7723f65b0a991d0336be7fe848a6ad17461d6cb27445a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC73 10296 bytes

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