Malicious PDF — malware analysis report

Static analysis result for SHA-256 0029f53b13419d7f…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 10:09:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 50b8f390202db4134ff898e5aede9bc3 SHA-1: 00b2622a6e9cf76713cfb6a97973982d456ae3cb SHA-256: 0029f53b13419d7f94eb7a3a62e921fe00e5904b6290d32905885ea625d29927
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are disguised as game-related hacks or generators, indicating a link farm or SEO manipulation tactic. The primary lure is for 'free spins in Coin Master' and 'free Robux', directing users to external URLs. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially malicious websites, possibly for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.tw/app/406889139/how-to-legally-get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-account-list-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/a-friendly-guest-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-redeem-card-numbers_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-com-easy_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-qweerial-cheat_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-really-works-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-bots-roblox-games_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-message-wont-go-away_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-realms-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000323b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323B 22796 bytes
SHA-256: ae7dcaa0118273041651f2477fa80273dbf7f7950a2f27099b869bb71f9a741d
font_01_sfnt_off0000653b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 18592 bytes
SHA-256: 534d446c9b588d963fa4df8185f91cfceb8168b0f734f13f841fe58b6b88bcd4

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