Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dd6f34c8ca62cd…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 00:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bc54af62f62cf44c6512c3a8e4dd2cce SHA-1: 743d0525f1a2438ded86cef9e9164945fb8dc81d SHA-256: 72dd6f34c8ca62cdb0e7c628baa5341e8568d8a463786861a0d36d266dc9533d
220 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to lure users into clicking on potentially malicious content, masquerading as game hacks or generators. The primary redirector URL, http://netcdn.tw/app/406889139/daily-free-spin-coin-master-link-game-hack, is associated with known malicious infrastructure. The document also hosts a large number of SEO-optimized PDF links, indicating a link farm designed to attract traffic and potentially distribute further malware.

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/406889139/daily-free-spin-coin-master-link-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/c00lkidds-roblox-hack-client-rc7_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-btools-cheat-tables_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-roblox-redeem-card-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hackear-nuclear-plant-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-weight-lifting-sim_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/does-roblox-use-an-anti-cheat_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/commands-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-mad-city-hack-script_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-coins-in-murder-mystery-2-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_off00002e68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E68 22804 bytes
SHA-256: 41ecd6c6f7d5856bd0001c4f82bd2c32a4af6426c551e32966434d0f1f3c7ad1
font_01_sfnt_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 18768 bytes
SHA-256: d697be63ee21a3cec570d2e62d957a88a7de4f3367accd652b11710ad4160183

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