Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b2111d292fdd57…

MALICIOUS

PDF

42.3 KB Authoring application: Karbon
MD5: fbb70445c6f9a4e049bc062eee4c2758 SHA-1: a0b65a6c358ad38519c732ad1380f467c5bd1a17 SHA-256: 86b2111d292fdd579c32fc38e869201e26ef8457a4b4c4b6dd74927aa4d60f71
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://mentorpreschools.com/uploads/1/3/0/6/130622066/migawuruvuridesusari.pdf
    • http://listenbyjj.com/uploads/1/3/0/6/130620375/b79d8f6597fc.pdf
    • http://seizediem.com/uploads/1/3/0/7/130775328/lexeguwuxujerupifav.pdf
    • http://shadowlights.cafe/uploads/1/3/0/6/130604083/kozitu.pdf
    • http://raiseyouruxiq.com/uploads/1/3/0/5/130541656/751833da82e3c.pdf
    • http://elizabethbrowndesign.com/uploads/1/3/0/5/130544447/luguna.pdf
    • http://www.romillyslimes.com/uploads/1/3/0/4/130436458/lobezoboz_vesuzu_bamegolumazop.pdf
    • http://tamilnaadulive.com/uploads/1/3/0/4/130483564/dfcf6ae0b7.pdf
    • http://pof-addcallsettings.com/uploads/1/3/0/7/130739778/8415206.pdf
    • http://sacred-journeys.net/uploads/1/3/0/5/130539432/40394392c.pdf
    • http://kauffmancenterstore.org/uploads/1/3/0/6/130639481/72f9b85aab2d9.pdf
    • http://sos-fansubs.com/uploads/1/3/0/4/130435955/wewezapofobubiv.pdf
    • http://30nlr.bpmtc.com/uploads/1/3/0/2/130287929/130287929.html#inventor+2017+3d+pdf+export
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a70.bin
d64a2b39a0df8eac04594b2597e0fc60f1b410714732f1d7cb1a170824fe354a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A70 9148 bytes
font_01_sfnt_off0000583b.bin
afd8868629b61d85ec32a8a0de1ca84da82d48156cdd7447d7c4f51403cf5149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x583B 5244 bytes

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