Malicious PDF — malware analysis report

Static analysis result for SHA-256 4862b658a045f8c0…

MALICIOUS

PDF

58.0 KB Authoring application: Solid Converter PDF
MD5: bec28600436c555021fa7e8a1ea838b2 SHA-1: 585ac528522f92d1b63a95ef34cf20773f72b6df SHA-256: 4862b658a045f8c02c86ae97fd8d56a9f46c63d9b75881106ca4ff7aeb40141a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness. The document body mentions MPSC material, but the primary malicious activity appears to be the distribution of numerous links to other PDF files, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://superlosertheplay.com/uploads/1/3/0/5/130551656/likanes.pdf
    • http://compressionsuorce.com/uploads/1/3/0/2/130273894/9d1e07.pdf
    • https://tomobotefagat.weebly.com/uploads/1/3/0/5/130539155/125b883d0980871.pdf
    • http://meredithkaler.com/uploads/1/3/0/5/130550722/xifutapur.pdf
    • http://thirdgradeladybugs.com/uploads/1/3/0/6/130604340/wizovilotu-jexazomu.pdf
    • https://sasurejojutim.weebly.com/uploads/1/3/0/2/130270974/4459645.pdf
    • http://xefeteni.swift-design.ru/uploads/2020/01/27/dilibimazad.pdf
    • http://xtremeshootingsports.com/uploads/1/3/0/5/130543310/1336555.pdf
    • http://zenobunny.com/uploads/1/3/0/6/130640013/1641889.pdf
    • http://oakscorp.com/uploads/1/3/0/2/130272440/dabusase.pdf
    • http://mojopix.net/uploads/1/3/0/2/130272936/xikoli-rabikoravoxomi-bajide-nepupowoj.pdf
    • https://guxulapoxebo.weebly.com/uploads/1/3/0/4/130476294/niwoxajaxoku.pdf
    • http://ohayocleaning.com/uploads/1/3/0/6/130639691/ketevefil.pdf
    • http://bcsinmoohapkido.com/uploads/1/3/0/5/130590279/7435535.pdf
    • http://mswoodman107.com/uploads/1/3/0/6/130621277/9278647.pdf
    • http://zagoxurigu.pyro.ru/uploads/2020/01/28/3505862.pdf
    • http://mi6app.com/uploads/1/3/0/3/130323485/3894925.pdf
    • http://fuwugesuf.top-shop21.ru/uploads/2020/01/27/4634704d83.pdf
    • http://tromboneandy.weebly.com/uploads/1/3/0/6/130604341/vekenukemomo.pdf
    • http://vegixu.paradise-hotel.ru/uploads/2020/01/27/752176.pdf
    • http://lenke-nauck.com/uploads/1/3/0/3/130324451/jesigene-pofipivisupato-gadatojabim.pdf
    • http://rehphotography.org/uploads/1/3/0/4/130483634/130483634.html#mpsc+english+grammar+in+marathi+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126f.bin
56f8c44971cfb88b3fd110f663380d5792a08300416e02dcf8b68037c02be818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F 8608 bytes
font_01_sfnt_off00008d84.bin
c3a3a5a1f271570c4562a4f23ea692623660bf8392a8496bb91e38c42b89c7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D84 13096 bytes

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