Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d463f9c9e242872…

MALICIOUS

PDF

44.2 KB Authoring application: GIMP
MD5: ddbdfa7cf689538dda98fcbe93da3020 SHA-1: 3ae0185aaa8ee490017953da7a250276d188fb79 SHA-256: 3d463f9c9e242872ce78e39a72e9de5deb082d84b3a216ede62844cff7933005
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This pattern is commonly associated with SEO poisoning or phishing campaigns designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://beta.lcspartan.com/uploads/1/3/0/7/130740622/fea01.pdf
    • http://nonreligiousspiritual.com/uploads/1/3/0/2/130272505/7526644.pdf
    • http://yes-bin-drin.com/uploads/1/3/0/6/130639278/xatokuboju_lifube.pdf
    • http://zerojb.com/uploads/1/3/0/2/130291415/32f8a6775667e29.pdf
    • http://oneaday.dance/uploads/1/3/0/2/130273842/2244915.pdf
    • http://minnesotahistorymuseums.org/uploads/1/3/0/6/130640010/jogukapotu.pdf
    • http://www.optuskickstart2020.com.au/uploads/1/3/0/6/130604765/jejewe-bubimino.pdf
    • http://buyplayadelcarmen.com/uploads/1/3/0/7/130775889/3289300.pdf
    • http://nexoclean.com/uploads/1/3/0/3/130379353/4230115.pdf
    • http://mercadopole.com/uploads/1/3/0/6/130639412/2d043.pdf
    • http://www.drbrandthawaii.com/uploads/1/3/0/6/130639841/3478246.pdf
    • http://host125.carmichaelnl.com/uploads/1/3/0/5/130540868/130540868.html#accelerometer+meaning+in+urdu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000036a4.bin
5f346530102d89a3ac90a543f4e2390472d4e0189eaea67432909cd247b05a04		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36A4 18952 bytes
font_01_sfnt_off0000567e.bin
28ed1b1b1f9cd7874e0c492dc2cd85fd83ed15c4feda9112561d6adebf7bdc83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 7960 bytes

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