Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f96fa77bcfe5ad8…

MALICIOUS

PDF

121.3 KB Created: 2021-01-14 11:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 005500244bb2e75b9f97737b29624ade SHA-1: e7f80b9f5fe05681392aa5dc3e96f522aa0c00e9 SHA-256: 2f96fa77bcfe5ad84e93731c743d254ad9652cd1cdf2a8c576d3d0824f4eb9e6
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary link directs to 'ggtraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Battlefield 5 digital size', suggesting a lure to trick users into visiting malicious sites for fake downloads or other scams. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=battlefield+5+digital++size In PDF document text
    • https://wiselulusitafe.weebly.com/uploads/1/3/4/8/134892864/5867776.pdfIn PDF document text
    • https://tajirokobi.weebly.com/uploads/1/3/4/9/134901714/vobipumozigab.pdfIn PDF document text
    • https://site-1221949.mozfiles.com/files/1221949/bollitori_zani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5fd67be33e2d3.pdfIn PDF document text
    • https://site-1174172.mozfiles.com/files/1174172/a_dance_of_fire_and_ice_download.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/taxadifupesafutom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fe45cfe010d1.pdfIn PDF document text
    • https://guwewekotijiz.weebly.com/uploads/1/3/4/7/134714515/danipalaredixi-monude-mikiguwus-redoviladezoj.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/14ffcd20a.pdfIn PDF document text
    • https://xomaribimufad.weebly.com/uploads/1/3/1/1/131163516/4395614.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/1e8e1d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001a7e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A7E9 26508 bytes
SHA-256: dce76f2f085eb24addfca1b2c6ff6a5581a653218e61e09095304b7d225c09cb
font_00_sfnt_off000162de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162DE 5204 bytes
SHA-256: 115b666cbbaf0db01f9a4fa7caed397b4ae1d4bdd8c0af8a6563d52e24126922
font_01_sfnt_off000174b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B7 16680 bytes
SHA-256: 8cab76f3d05da2d0644dfaf9408c9c567a621a476395105b692b1a07069056e1

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