Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65b6b5e86a9e95b…

MALICIOUS

PDF

42.1 KB Authoring application: Scribus
MD5: 67f8e981033b732fd9ad3d21b442b051 SHA-1: b87178e17f708e2360c8c283c77bdc173c51362a SHA-256: e65b6b5e86a9e95b3c56b460791c551278f8e6eee1c6f584f94797288491e210
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malware distribution intent. The document body, while containing some corrupted data, mentions 'Raining blood drum sheet music' and presents itself as an 'Instant Download, Printable PDF File', which serves as a lure to encourage users to click on the embedded malicious links.

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://rotten.red/uploads/1/3/0/4/130488811/95fd78cb95.pdf
    • http://miko-trans.pl/uploads/1/3/0/5/130588966/laleli.pdf
    • http://suvepom.csrnomey.com/uploads/2020/01/29/meposusape.pdf
    • http://alisonreber.com/uploads/1/3/0/3/130313484/xozipotede.pdf
    • http://rubyjoybook.com/uploads/1/3/0/5/130539612/zolabiko.pdf
    • http://nimever.cosmuslug.com/uploads/2020/01/29/1139764.pdf
    • http://edtnetworks.com/uploads/1/3/0/6/130604314/jumuzadaxozusu.pdf
    • http://caiartdesigns.com/uploads/1/3/0/3/130323703/6b18cef6bc.pdf
    • http://nickmosca.com/uploads/1/3/0/4/130436085/52c046ac9f.pdf
    • http://lelovik.multilinglab.ru/uploads/2020/01/28/tovalemarowujalivuz.pdf
    • http://carpetcleancary.com/uploads/1/3/0/2/130272977/130272977.html#raining+blood+drum+sheet+music

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fb.bin
93a462e96eb4d5251551e03e03e67e9d8ed5a3e04409c1c1539e4ee57a0f9d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB 7928 bytes
font_01_sfnt_off00005aa9.bin
9dbefd29ad56edc3ec27c88540d7d41398a664ae3f1544cdca53ccca226c91b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 10764 bytes

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