Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e951cd57de466a…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 15:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1a7f7ee288989bd80ee74b1c0ed91ba0 SHA-1: 6be46b67b204e0e24877908344971394b4989756 SHA-256: 73e951cd57de466a7613d844887a6829d8017ad7688d9a94d6f3d04fb8ca3126
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a malicious website, masquerading as a 'free generator' for game currency. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/coin-master-hack-spins-and-coins-unlimited-free-game-hack In PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-apocalypse-rising-hack-gui_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/shirt-free-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hilton-hotels-lua-c-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-beta-warships-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hack-999999-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/pokemon-go-free-remote-raid-pass-march-2021_GM1094591345.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-money-on-arsenal-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-clone-tycoon-hacks_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-fix-cheat-engine-66-roblox-shutdown_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hacking-roblox-dll_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003335.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3335 23584 bytes
SHA-256: 46924bc495c7d966071080874195a43fa2ffb3c57766fb76060963e42c49c3f5
font_01_sfnt_off000068ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 19036 bytes
SHA-256: 210ffa2b1257eecc61bc0a96a8b024f9d7cb0b9b85e8dcb329e8b8773fbc43e7

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