Malicious PDF — malware analysis report

Static analysis result for SHA-256 425b4d1ffa990233…

MALICIOUS

PDF

35.5 KB Authoring application: Smallpdf Desktop
MD5: b090aeb83a13268cf2b367ebb08d1fbd SHA-1: a91dd7758d9e66051683288afb6b6998e5d6cf4f SHA-256: 425b4d1ffa990233a8e1fc3ddebaadc7a6a89ee5d08681982fafd57195ac283d
160 Risk Score

Malware Insights

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

The PDF document contains a lure related to a 'Neverwinter launcher stuck on patching' issue, aiming to trick the user into interacting with the document. It also features a large number of external PDF links, indicating a link farm for SEO or traffic redirection. The ClamAV heuristic confirms this is a phishing-related PDF, likely designed to lead users to download further malicious content.

Heuristics 4

  • 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://kineffect.com/uploads/1/3/0/3/130313433/ba27415c.pdf
    • http://cadencechiassonlmft.com/uploads/1/3/0/4/130483487/93d255.pdf
    • http://photoboa.ch/uploads/1/3/0/3/130379305/8564951.pdf
    • http://alessandramotterle.com/uploads/1/3/0/2/130288334/7191778.pdf
    • http://mylsathouse.com/uploads/1/3/0/4/130488316/2635355.pdf
    • http://gek.newdex.xyz/uploads/2020/01/28/4045aac21.pdf
    • http://aikosilkart.net/uploads/1/3/0/5/130540176/jivexulujuxexewo.pdf
    • http://apexsportswellness.com/uploads/1/3/0/3/130323360/bakajolaluwosuma.pdf
    • http://cyclebavaria.com/uploads/1/3/0/4/130483300/130483300.html#neverwinter+launcher+stuck+on+patching

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001191.bin
ec47478d4731bdb294e10d98750839e3682e638c6b99496cee18a2fbf7893f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1191 8248 bytes

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