Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd64bd40f98c85c…

MALICIOUS

PDF

35.1 KB Authoring application: Karbon
MD5: e9510117dfefa8d431fcbc5e2dd9347c SHA-1: 8a87346dc690d4d85db0b1dc914ccb0baff32f35 SHA-256: 3cd64bd40f98c85c6ec770461fe42c4374bbeadf49cb92d3ebd71ac2f6e32485
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs likely lead to further malicious content or phishing pages.

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://radioarcana.org/uploads/1/3/0/2/130273842/96274cdfc801.pdf
    • http://faithandyoga.com/uploads/1/3/0/6/130604562/paxazak.pdf
    • http://cranecrews.com/uploads/1/3/0/2/130272234/mupabezenafemoduvefi.pdf
    • http://lowcarbladipoet.com/uploads/1/3/0/2/130289494/jabife_vobegu_nojababa_belonata.pdf
    • http://kigginsco.com/uploads/1/3/0/5/130550814/5838488.pdf
    • http://koffienator.nl/uploads/1/3/0/6/130640179/pezavomufenaw.pdf
    • http://artesania.store/uploads/1/3/0/5/130590054/a06657a5.pdf
    • http://reachsports.net/uploads/1/3/0/6/130604292/dexisime_zaronukexuj_dozitisilowowuk_jirojekas.pdf
    • http://smileshop10.ru/uploads/2020/01/28/zidaxigavafanon.pdf
    • http://nowator.eu/uploads/1/3/0/4/130483117/130483117.html#squarespace+email+format

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001219.bin
99e855d0a8196c24b9bb000e3237dc3aadf838641cddf7fba42ef3ca6095a676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1219 8624 bytes

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