Malicious PDF — malware analysis report

Static analysis result for SHA-256 829c6d03e797f9be…

MALICIOUS

PDF

42.2 KB Authoring application: Pdftk
MD5: 40780712470a2cbf1bf76b8dd6b0d40c SHA-1: 89552f804e936e3184d7e64c26a53192eb6aa243 SHA-256: 829c6d03e797f9be8d3ba3863c842506a44506fbe78bf6d37155e00579cba041
160 Risk Score

Malware Insights

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

The PDF file contains a link farm of external PDF files, disguised as a PC building simulator download. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicate that this is a phishing attempt designed to trick users into downloading further malicious content, likely an archive requiring a password provided within the document. The embedded URLs are the primary indicators of malicious intent.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://summerfoxart.com/uploads/1/3/0/6/130604860/zizudizaji.pdf
    • http://dezawo.kesh-dev.com/uploads/2020/01/28/wawum.pdf
    • http://noahsgiftsandgallery.com/uploads/1/3/0/7/130740297/pajasinogur.pdf
    • http://sidemountainspecialtyfoods.com/uploads/1/3/0/6/130604185/tomavozabagigo_gaxan_dupod_sevamipifoz.pdf
    • http://kristenfong.info/uploads/1/3/0/2/130287457/pojemudenixol.pdf
    • http://nevadachallenger.net/uploads/1/3/0/6/130604815/a6a059447739d.pdf
    • http://prosphatos.com/uploads/1/3/0/5/130539113/tolanenikoliba.pdf
    • http://pasquiasnowgoers.ca/uploads/1/3/0/6/130620309/1312631.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/7/130776089/130776089.html#pc+building+simulator++highly+compressed

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001224.bin
30bda338bad4fbdc50bc27fc00bc211714293c26c6339ef65b4773fa88a1d6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1224 8492 bytes
font_01_sfnt_off00006af3.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF3 1708 bytes

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