Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd5f1d4b29b19b2…

MALICIOUS

PDF

48.6 KB Authoring application: Mobipocket Creator
MD5: efe7cf14e59b8e05fab535597d69327c SHA-1: b07b6882429579ea8072f575a7a36c2a8fe0e922 SHA-256: cfd5f1d4b29b19b2c48f326d418e84d5a3d3f15dcc2bf36f27aa09476f2c267c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, for malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded external links, with the primary one being http://capitalmetal.com/uploads/1/3/0/4/130483862/fowane-bidewuxodov-megolasifaf.pdf. This suggests the document's purpose is to lure users into clicking these links, likely leading to phishing sites or further malware downloads.

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://capitalmetal.com/uploads/1/3/0/4/130483862/fowane-bidewuxodov-megolasifaf.pdf
    • https://mepazamiw.weebly.com/uploads/1/3/0/2/130287862/914646.pdf
    • http://thatyoumaybelieve.com/uploads/1/3/0/5/130546183/f0936d8.pdf
    • http://mr-organics.eu/uploads/1/3/0/7/130739632/b61abce6e2c.pdf
    • http://zuni.audiostart58.icu/uploads/2020/01/28/8787670.pdf
    • http://gono.tkd-cska.ru/uploads/2020/01/29/1771407.pdf
    • http://zanerotoxe.gesscsverde.site/uploads/2020/01/28/guxewafomupafopu.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/5/130589412/kinojapu.pdf
    • http://amodernmaenad.com/uploads/1/3/0/4/130483477/5057836.pdf
    • http://dazzlingweddingsandevents.com/uploads/1/3/0/4/130435654/jikat.pdf
    • http://ottawahomefinders.com/uploads/1/3/0/3/130379061/1228098.pdf
    • http://oakclass.com/uploads/1/3/0/5/130589006/130589006.html#cambridge+igcse+biology+revision+gui

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001317.bin
e5e49921d18cd55f7025b2d5d0e3b50ec8cfb75176270292e4d424e5f7bcbfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1317 9372 bytes
font_01_sfnt_off00006ed9.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED9 16268 bytes
font_02_sfnt_off000083e9.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 1708 bytes

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