Malicious PDF — malware analysis report

Static analysis result for SHA-256 c781a23b0bb1e4a5…

MALICIOUS

PDF

37.1 KB Authoring application: Poppler-utils
MD5: 2c4178a228cfa5e5248cd9aae1af467d SHA-1: 43cb182d9f80a35c5c949cf37e4a567732d40ac0 SHA-256: c781a23b0bb1e4a569e894c15066e62affc4428bc6a6c3cc49e63386bf2a3d8a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique commonly used for SEO-based phishing or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body itself is largely unreadable, but the presence of numerous links suggests a lure to external content.

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://bewaxojex.weebly.com/uploads/1/3/0/4/130494478/2993807.pdf
    • http://mutikufuv.myalbumsexy.com/uploads/2020/01/28/b2b00.pdf
    • http://music-kidskola.com/uploads/2020/01/28/nokokonilomem.pdf
    • http://marzipoppy.com/uploads/1/3/0/6/130621020/raguwis-lupurefeze-kowonurut-munep.pdf
    • http://sewote.topdream.pro/uploads/2020/01/27/b45ca50c3c29.pdf
    • http://kisubi.chess-nut.com/uploads/2020/01/28/2210072.pdf
    • http://seacareconsult.com/uploads/1/3/0/3/130379342/a0ea2ab579.pdf
    • http://apoaaxi.org/uploads/1/3/0/5/130551704/2168716.pdf
    • http://synodcanada.com/uploads/1/3/0/4/130488165/bitine.pdf
    • http://njokphotos.com/uploads/1/3/0/2/130287973/17bd990a2825950.pdf
    • http://bik.grandkuhni.ru/uploads/2020/01/27/jiwijiregi.pdf
    • http://masedusa.ethsmart.biz/uploads/2020/01/29/xokal.pdf
    • http://xovegadawu.101doggy.com/uploads/2020/01/27/4a220d1b8.pdf
    • http://muvut.osbert11.com/uploads/2020/01/27/2657187.pdf
    • http://mhentscheldesigns.com/uploads/1/3/0/2/130289613/850e885.pdf
    • http://mobilhomebluesky.com/uploads/1/3/0/2/130288468/tipim.pdf
    • http://cre8.work/uploads/1/3/0/5/130551704/guwamigemuves.pdf
    • http://ohioawnings.com/uploads/1/3/0/3/130323301/ligumu.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/5/130588261/130588261.html#third+conditional+exercises+learn+english

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014b8.bin
3caa17518ccf58a38b7ebb6b04035012f081cf8b39038f9137626e7e29a54ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8 7660 bytes

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