Malicious PDF — malware analysis report

Static analysis result for SHA-256 6020d81e2fac7ef4…

MALICIOUS

PDF

32.3 KB Authoring application: Mobipocket Creator
MD5: ec834f627c5f25bb80fb5b3586f64eab SHA-1: 98c37b5c10de67b87dd6757beac9e96e544c74a9 SHA-256: 6020d81e2fac7ef49866588bb8f2ce2eb9899ed4b837047f31c27391a51a3929
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were extracted, the structure and URL distribution suggest a phishing or content-distribution campaign.

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://fimo.banyacrm.ru/uploads/2020/01/28/kogebomedojuvawosos.pdf
    • http://solebait.com/uploads/1/3/0/6/130604789/vibebisuzeno.pdf
    • http://coreydennison.net/uploads/1/3/0/4/130491179/revubaroret_dadoravopefuv_woser.pdf
    • http://weed-feed.me/uploads/1/3/0/6/130621317/jadazesuveguke_tidasap_gugebakaxapiga_wokexapimutugor.pdf
    • http://nuevalinea.es/uploads/1/3/0/6/130620783/zinuvev-mojabi.pdf
    • http://aguayoperformance.com/uploads/1/3/0/6/130639642/xewuka.pdf
    • http://mitienditaluu.com/uploads/1/3/0/4/130435763/gusip.pdf
    • http://mrsrehm.com/uploads/1/3/0/5/130590393/zakurizu.pdf
    • http://crazyjean.com/uploads/1/3/0/4/130476048/4799243.pdf
    • http://benkregel.com/uploads/1/3/0/2/130274088/130274088.html#checks+and+balances+system+a+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e7.bin
2abdea5612e2b4977f6052e529e8b65589ead9378dd7011acde13860a96d800d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7 7508 bytes

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