Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba3e9390e5d331c…

MALICIOUS

PDF

62.5 KB Authoring application: Soda PDF
MD5: f0a03a75f2ef653048a2b50964b9e621 SHA-1: ca6b5c49399b7444d2ecc620ef8f70f914a8e3db SHA-256: cba3e9390e5d331c91be13376b872e9fdfcd053b53d5df85dc31c7034bebb5cd
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. This technique is often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

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://canaiandchai.com/uploads/1/3/0/4/130491703/4072699.pdf
    • http://www.acufirstchoice.com/uploads/1/3/0/3/130323206/rebawusibip.pdf
    • http://dgiindex.org/uploads/1/3/0/5/130550723/pilabexemona_julopijuxul_peguxapot_vefajiromodetav.pdf
    • http://benjaminburnham.com/uploads/1/3/0/5/130589057/6422198.pdf
    • http://mounthebronstem.com/uploads/1/3/0/5/130551434/barovofepovolaxemeb.pdf
    • http://convergecamp.co.uk/uploads/1/3/0/4/130435876/e7d763ac3ab.pdf
    • http://obhaw.net/uploads/1/3/0/6/130621401/2496096.pdf
    • http://mx3.rampensau.training/uploads/1/3/0/3/130323997/7242416.pdf
    • http://myapotheka.com/uploads/1/3/0/6/130620673/7401590.pdf
    • http://babywhoopsie.com/uploads/1/3/0/5/130588675/14a34.pdf
    • http://www.ghostly-art.com/uploads/1/3/0/7/130775396/ec6a69e18fd1237.pdf
    • http://life-simplified.org/uploads/1/3/0/4/130435998/8540690.pdf
    • http://www.altoedc.com/uploads/1/3/0/7/130738572/130738572.html#what+is+rheumatic+fever+and+rheumatic+heart+disease

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001380.bin
cbc1fe886a7d96ae656d6e096fdfd2c3d72a27f15daf3adee5a25e4741f1dcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380 9516 bytes
font_01_sfnt_off0000b946.bin
4e9ae17c41f053e7ad2cff4c16f4465db96732130fdde230725ded2fe80853ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB946 3156 bytes

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