Malicious PDF — malware analysis report

Static analysis result for SHA-256 812ff4dd03aec547…

MALICIOUS

PDF

44.7 KB Authoring application: Scribus
MD5: 51b204d898b0e2f8231e10412d0685cb SHA-1: 398f5a7ace998d9f3e7fdb6b7c2dc61f63628735 SHA-256: 812ff4dd03aec54765b81261c8f5f5ed30c0073ffff479db0208609266df45a6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various PDF files hosted on different domains, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing-related malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 https://ruwonuvexojivob.weebly.com/uploads/1/3/0/3/130379151/jejofe.pdf
    • http://i1i1.icu/uploads/2020/01/28/lepiko.pdf
    • http://miss-nelson.com/uploads/1/3/0/2/130287898/5488219.pdf
    • http://malekwilliams.com/uploads/1/3/0/6/130604524/7428049.pdf
    • http://kupidomofon.ru/uploads/2020/01/28/7942531.pdf
    • https://nokojobo.weebly.com/uploads/1/3/0/4/130436049/tukupise-reginazinirital.pdf
    • http://suxodegig.wecleanatlantaoffices.com/uploads/2020/01/29/dugege_juxuz.pdf
    • http://c5events.ca/uploads/1/3/0/3/130379711/4387302.pdf
    • http://latitudeyachtmanagement.com/uploads/1/3/0/2/130270768/5237338.pdf
    • http://itexno.su/uploads/2020/01/27/8043781.pdf
    • http://cargo-floor.ru/uploads/2020/01/28/gadetanupig.pdf
    • http://shopbelfast.info/uploads/1/3/0/4/130483413/130483413.html#datacamp+machine+learning+cheat+sheet
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001454.bin
f0819b73959c5f5d7e6f1d7c751d77195302904e664535d7ff22277a81f32125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1454 8660 bytes
font_01_sfnt_off00006159.bin
0a19d3ec01c2bd5f2da2e654894ff9caac3df97291af1acb5ff150be3e6b34cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 18100 bytes

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