Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eacc92d0e7788e9…

MALICIOUS

PDF

68.7 KB Created: 2020-12-14 13:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be2ef02b8706add5045fa21d94e9e08 SHA-1: eb01fee68ad8c80a927fbb4692161c611cf567cd SHA-256: 4eacc92d0e7788e992a536f62fe38f4faec360f628f66f231071d1efbc45c15e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffine.ru/strik?utm_term=the+raven+king+pdf+download', is flagged as suspicious and likely leads to a phishing or malware distribution site. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing the malicious nature. The document body, though truncated and obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate PDF download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=the+raven+king+pdf+download
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/tuxote-betotuba-waxalaxejatutav-vigasobevu.pdf
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fd06e85de109.pdf
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/turoxa.pdf
    • https://cdn-cms.f-static.net/uploads/4452608/normal_5fa1d06edbac3.pdf
    • https://guzavubovusev.weebly.com/uploads/1/3/4/6/134659469/10967f83624021.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc787cf81fec0096842b2a2/t/5fcfcdf315c1b81ea4e1eaf5/1607454195840/vazerixigin.pdf
    • https://uploads.strikinglycdn.com/files/b6a4415d-84b5-4537-8f77-a2cff23a0619/wobota.pdf
    • https://static1.squarespace.com/static/5fc714e6c89b935f15e02e5c/t/5fd68df1b1c3f31c7a888fc1/1607896565592/66009403150.pdf
    • https://static1.squarespace.com/static/5fc676cd1452f90b7f0b4806/t/5fd6509796ed101a3e3d9381/1607880855431/aws_aurora_mysql_performance_insights.pdf
    • https://static1.squarespace.com/static/5fc0ebbe5687f52b6b814126/t/5fc828d926a3037b4330f5af/1606953178077/ribegobiritelitipinepe.pdf
    • https://static1.squarespace.com/static/5fc2a81ee5c7695ca9a6fa19/t/5fd16321b0f0f842d798cca7/1607557921655/76676362625.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2da.bin
82ad43224dde83ff5945098faa36c26c76dcc773014be7d7978365b4bbc62a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DA 5000 bytes
font_01_sfnt_off0000d3e0.bin
37015ceecad2d74448fbcfe96f0283acab139870eb8068d02b983d1df24fd36a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E0 10564 bytes
font_02_sfnt_off0000f815.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF815 4324 bytes

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