Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf81f158688fddc…

MALICIOUS

PDF

37.9 KB Authoring application: OpenOffice.org
MD5: 0adef857ffa33758644d27e796a00496 SHA-1: 726b3abf1c1421c8efd223cdbfa6505037dac419 SHA-256: baf81f158688fddc3a45f92421f5c2cf3ac57e4c70aa9dc60457af4aa971b675
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm strategy. This is strongly suggestive of SEO poisoning or phishing tactics designed to drive traffic to malicious content. The ClamAV detection and ML classifier further support the malicious nature of this document.

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://kuhni-msc003.icu/uploads/2020/01/28/vuzumugezozi.pdf
    • http://12stepstudyworkshop.com/uploads/1/3/0/4/130488631/mudut.pdf
    • http://crrc.website/uploads/1/3/0/3/130323522/1542837.pdf
    • http://buildingonbookspodcast.com/uploads/1/3/0/6/130620737/bcd10f8383d7104.pdf
    • http://berberthemes.com/uploads/1/3/0/5/130551181/7087172.pdf
    • http://popoku.el1t.ru/uploads/2020/01/29/f3d95c2d6b0540.pdf
    • http://norcalsetac.net/uploads/1/3/0/6/130620456/222dc1197077d0.pdf
    • http://northcoastwalkingtours.com/uploads/1/3/0/3/130379151/4698463.pdf
    • http://glammeshops.com/uploads/1/3/0/4/130489536/9671431.pdf
    • http://adayofhope.co/uploads/1/3/0/2/130272443/welologok-jizolazusi-rerowago-bimizo.pdf
    • http://chewoncakes.com/uploads/1/3/0/6/130639547/130639547.html#evaluation+education+civique+6%C3%A8me+droits+et+devoirs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014a7.bin
69249726261475508bcf784b8fd4db9fc033c2141102e153fbb3a3e3762267e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7 9836 bytes

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