Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65b8821f8444710…

MALICIOUS

PDF

38.7 KB Authoring application: pstoedit
MD5: 37cf67e4846b21271cb479b6de6024c0 SHA-1: 6762f291c2faa8ab8b03a6f63ab80cc29d355104 SHA-256: a65b8821f8444710d4949c98a5dc845859af318f51d4eccf581a992a97d5a545
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it with high confidence. No scripts were extracted, but the sheer volume of links suggests a malicious intent to drive traffic to potentially compromised or malicious domains.

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://www.bestowgiftsandfavors.com/uploads/1/3/0/4/130435978/cf045cdeae.pdf
    • http://www.email.psisac.com/uploads/1/3/0/4/130483679/mikupax-pexiredawekot-jezoruk-pimixe.pdf
    • http://alicetopple-textiles.com/uploads/1/3/0/8/130813765/tavavovanubiripix.pdf
    • http://jacquelinesfaceatelier.com/uploads/1/3/0/5/130552073/595a0.pdf
    • http://chocolaticity.net/uploads/1/3/0/6/130621582/944570eba77c2.pdf
    • http://sharonthelibrarian.com/uploads/1/3/0/5/130545173/bexoxe.pdf
    • http://ultimateadventuretraining.com/uploads/1/3/0/5/130589054/kizugovilafalumovik.pdf
    • http://www.michelejoyjewelry.com/uploads/1/3/0/4/130483869/4227611.pdf
    • http://sbedard.ca/uploads/1/3/0/4/130489247/voromamufobeka_bumetexetoleku.pdf
    • http://stephonjohnson.com/uploads/1/3/0/4/130435833/1bb20a.pdf
    • http://skinnydogconsulting.com/uploads/1/3/0/7/130738892/gunajepedez.pdf
    • http://myhtri.net/uploads/1/3/0/3/130323157/gujiwawetifa-mojalefavotidu-naxusugatoduwo.pdf
    • http://wangziyulekaihu.br3h.com/uploads/1/3/0/2/130287238/130287238.html#examples+of+effective+cover+letters+for+resume
    • http://chocolaticity.net/uploads/1/3/0/6/130621582

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003eaf.bin
515ccaa630a10a7e45153bbd39b8e3cc6cd18fce61436c2cae1c2b734d4f0e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EAF 8124 bytes

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