Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d79edb50ff62a6b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 10:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d31c48a3426450bf5c80e6c4060304fe SHA-1: 10f3361b192f47243d78aca165618aa3c189eddd SHA-256: 4d79edb50ff62a6be76a21e08d03c0c61518b75d9b80ec11dee04cde7fb8c3b7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are identified as malicious redirectors or part of a link farm. The document body and heuristics indicate a lure for game hacks and free currency, specifically mentioning 'tiktok-free-money-game-hack'. This suggests the primary goal is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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/835599320/tiktok-free-money-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-nation-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-any-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-robux-in-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-script-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-from-a-game_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-other-peoples-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-sword-fight-game-templates_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-promo-codes-roblox-december-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-rewards-free-spins_GM406889139.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_off000030f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F0 22476 bytes
SHA-256: 5da3791048ec0bfbf40dee69b7426e047b11b46381ebc6bd82e95efa8e0763ac
font_01_sfnt_off000062ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 18348 bytes
SHA-256: 9fea4edd66a53461ddc8db3f780be3eb9c7765d5a60d8f203fa8cd1a7e693ead

Open this report in the interactive analyzer, or submit your own file for analysis.