Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c4261620829b76…

MALICIOUS

PDF

33.2 KB Authoring application: Serif PagePlus
MD5: 03d58bb4b642b970bc74aa7dcee53d70 SHA-1: 3302832c53c1c799359d12544b3157bf71195b28 SHA-256: 83c4261620829b76e86c0b2e731979951e543afebebf4fe47d37b840a93c9023
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various malicious PDF files, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body attempts to trick users with a fake 'Airdrop version for android' lure, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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://maudedistrict.com/uploads/1/3/0/3/130313072/tugebovekenuz.pdf
    • http://scrappingfairy.net/uploads/1/3/0/2/130289232/e65b8.pdf
    • http://sjhameed.com/uploads/1/3/0/6/130604036/714304.pdf
    • http://mommalovesyou.net/uploads/1/3/0/2/130289336/3011736.pdf
    • http://piterlife-78.ru/uploads/2020/01/27/869189bf.pdf
    • http://mkyc.weebly.com/uploads/1/3/0/5/130544070/lubawufedevarav.pdf
    • http://michaudwellness.com/uploads/1/3/0/6/130605216/130605216.html#airdrop+version+for+android

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010b2.bin
72ea35359ff5211f6435904d0c67b58d94fab4e6f96bb6fa62f8f63bec9f1aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2 8100 bytes

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