Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f553dc0e9b7ff4a…

MALICIOUS

PDF

43.9 KB Authoring application: pdf-parser
MD5: d4c66b0bc1a483b7ae25d05bc0cb4b2c SHA-1: a48f5412132d6dd22ce943790e51a71842012baf SHA-256: 5f553dc0e9b7ff4a69d5ba1224c2e211027603c2866d28b0c5f7d1f1b845a4ff
192 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files hosted on various websites, suggesting a link farm or redirection mechanism. The document body mentions 'Fiba world cup 2018 philippines schedule' as a lure to encourage clicking on these links. The presence of embedded URLs and the ML classifier output strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://southwestminnesotastringfestival.com/uploads/1/3/0/2/130289186/jasadegeje-nogorebid-zoxikizutanur-nabalezodusebuz.pdf
    • http://nononsensehomeinspection.com/uploads/1/3/0/3/130379523/a09ae35eb9088af.pdf
    • http://nightowlcraftery.com/uploads/1/3/0/8/130814782/fokedun.pdf
    • http://thespkez.com/uploads/1/3/0/4/130483819/wexoriw.pdf
    • http://damoj.faring8.net/uploads/2020/01/28/sogobexen-xiroveman.pdf
    • http://brandonhartshorn.com/uploads/1/3/0/2/130272905/5969833.pdf
    • http://thegardenhead.com/uploads/1/3/0/3/130323836/21baaffa547a1b1.pdf
    • http://gatheredfragments.com/uploads/1/3/0/4/130483276/midipatumatu.pdf
    • https://zafububefolom.weebly.com/uploads/1/3/0/3/130379509/pupepisuxetuxa-napuforegirosif.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/6/130604779/130604779.html#fiba+world+cup+2018+philippines+schedule

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001279.bin
dd0ea2bd73757cfbbb4a6cf618b97689f76b7b23204518c8fe9386eef648fb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1279 8012 bytes

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