Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eda6c60891973a…

MALICIOUS

PDF

43.9 KB Authoring application: Scribus
MD5: 6899f138fb2e822ac6e34e85ab6d4393 SHA-1: 2f4c49256666b4f3b8450458aa73031e3109ce42 SHA-256: 16eda6c60891973ac25ce6d7c2edc494ada171d91c4995dcb95899efb454ebe1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to other PDF documents on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or distribute a large volume of content, potentially malicious. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. No scripts were extracted from this sample, but the sheer volume of external links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bygollycandlesnmore.com/uploads/1/3/0/6/130605040/dorilemikira.pdf
    • http://newmillerdam.org/uploads/1/3/0/4/130489650/kebimatot.pdf
    • http://abortionkuwait.com/uploads/1/3/0/5/130541574/savilukadoguxelusa.pdf
    • http://cassandraneuhauspsyd.com/uploads/1/3/0/5/130546392/xuxefujawijezu.pdf
    • http://passantefinancial.com/uploads/1/3/0/5/130589415/4278738.pdf
    • http://namelesstea.com/uploads/1/3/0/5/130543402/1747941.pdf
    • http://naturalraysllc.com/uploads/1/3/0/6/130620240/zibidi_zujofelijunuk_nejufekeb.pdf
    • http://tegur.photographer-sevastopol.ru/uploads/2020/01/28/1608144.pdf
    • http://undiscoveredactress.com/uploads/1/3/0/6/130621303/4938776.pdf
    • http://aapae.org/uploads/1/3/0/6/130621344/f0f68a.pdf
    • http://dikejoner.hiperamarelas.com/uploads/2020/01/27/6197266.pdf
    • http://savonappliances.ca/uploads/1/3/0/4/130488141/df5db1fb0951e9.pdf
    • http://westybands.com/uploads/1/3/0/5/130544191/zelusar.pdf
    • http://gep.pennystockpromotions.com/uploads/2020/01/28/7180405.pdf
    • http://usedofficechairs.net/uploads/1/3/0/5/130540197/c5a914bfd3b1b4.pdf
    • http://dlhp-solutions.com/uploads/1/3/0/6/130620515/46435.pdf
    • http://difizewoba.egwrtjetggg.xyz/uploads/2020/01/27/2c6737.pdf
    • http://southtynesideagainstbullying.co.uk/uploads/1/3/0/6/130604806/kisuwisuke.pdf
    • https://fabateja.weebly.com/uploads/1/3/0/2/130289541/4297017.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/6/130621205/130621205.html#beckhoff+canopen+manual
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001578.bin
dcf96e2901469c3d313e25b8c36b3263fc4c98bda28d023d77d79850ed722702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1578 8620 bytes
font_01_sfnt_off000063f6.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 16204 bytes

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