Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79b3cfce5d973cc…

MALICIOUS

PDF

75.1 KB Authoring application: Inkscape
MD5: d2fdc162664eff7373fd01ab463d7db0 SHA-1: ec397ecb48fe25183dbb8f7733991b5764c02267 SHA-256: a79b3cfce5d973ccbcdc39090d2cda3d00f40c187208b75c64194c11431a9a93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains a large number of external links to other PDF files, indicating a link farm or redirection strategy. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests that the document may contain instructions for executing commands, potentially to download or execute further payloads. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious intent. The primary attack pattern involves directing users to a multitude of external PDF resources.

Heuristics 4

  • 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
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://www.gmextech.com/uploads/1/3/0/4/130483862/gafevo_xujes_zanegapig_tupomadewerok.pdf
    • http://camp720.com/uploads/1/3/0/2/130271214/lulurorijepidupekif.pdf
    • http://juliemaurer.net/uploads/1/3/0/4/130483542/kumokar.pdf
    • http://gotroots.co.uk/uploads/1/3/0/5/130539458/kibirejamoluvurin.pdf
    • http://pacificcoastvisions.com/uploads/1/3/0/7/130738943/88a503578f.pdf
    • http://mangotangocafe.com/uploads/1/3/0/6/130604882/najuxaza_nanabege.pdf
    • http://retail-arbitrage.training/uploads/1/3/0/2/130289510/xukimolu-boganopazosazaf-sekimo.pdf
    • http://beeclubsales.net/uploads/1/3/0/6/130620678/pejozogorida_guwapol_riwofewejeguto_ribudexuvu.pdf
    • http://smpweddingandeventproductions.net/uploads/1/3/0/8/130814349/2f0cd307af1d.pdf
    • http://www.disabilityresearch.org/uploads/1/3/0/8/130813489/disudejevafasaxinu.pdf
    • http://admin.jpgallagher.co.uk/uploads/1/3/0/5/130551230/xobiw_tepolube.pdf
    • http://justincdavismusic.com/uploads/1/3/0/5/130589182/lipiloronalig.pdf
    • http://74-123-72-117.mgwnet.com/uploads/1/3/0/7/130738889/130738889.html#gestalt+therapy+the+empty+chair+technique

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004080.bin
8f2a662dee1de88da07f781d2781be4f8adbfdf5c618cb85ca031cf66c399534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4080 8932 bytes

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