Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b606e7aac97385…

MALICIOUS

PDF

52.4 KB Authoring application: Karbon
MD5: ea053a1b7015464e7a55c0355a0399cb SHA-1: 6cec0d6412243e45da5d9be1395b67684c986290 SHA-256: 92b606e7aac97385a36fba19cfa95db4fcd237d5f6b6f880b1f1408235d16864
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains, a technique commonly used for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to redirect users to potentially malicious content.

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://tovaryonline.site/uploads/1/3/0/7/130776249/gexoku.pdf
    • http://adentarussia.com/uploads/1/3/0/2/130272271/010217.pdf
    • http://hostmaster.peterdumbreck.com/uploads/1/3/0/6/130639521/lukitalegiwes_xofur_kodebivusew_jejatokokatib.pdf
    • http://counterblaze.com/uploads/1/3/0/3/130379651/pepoja_lovezixenatapi.pdf
    • http://www.longacreslodge.com/uploads/1/3/0/3/130379319/nigul-buzosabikawot-kosexemajobala.pdf
    • http://www.perfect-trucks.com/uploads/1/3/0/3/130379363/33d9123175886e2.pdf
    • http://fatcavbyemz.com/uploads/1/3/0/6/130639607/fenasemadewodubal.pdf
    • http://reviewgaggifts.com/uploads/1/3/0/4/130488946/be6a7ba6e64e52.pdf
    • http://jevasconpower.com/uploads/1/3/0/2/130289238/1620460.pdf
    • http://lostprairieshorthairs.com/uploads/1/3/0/6/130621800/1928915.pdf
    • http://scoutrageous.org/uploads/1/3/0/6/130604401/6666484.pdf
    • http://kenzenk.com/uploads/1/3/0/2/130291689/timaji.pdf
    • http://0ws5k.bpmtc.com/uploads/1/3/0/2/130272443/130272443.html#navodaya+vidyalaya+11+class+admission+2019

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004264.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4264 1388 bytes
font_01_sfnt_off00004be1.bin
5510bd7f74ae587014aa15276a11e33c59b9e4fdbb67310a9e93c53cd4fb1738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE1 14748 bytes
font_02_sfnt_off000075e2.bin
b3820e65b9a58d794218e99b5585a4921ba9e71ea1e5d5699f55549375cc4a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 7704 bytes

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