Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff13718ab0257ab7…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 01:35:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fda3de702ff9814235c5a16ec4e46a93 SHA-1: b1c08a9f72151e554f0e1d8f8e701a6d263501da SHA-256: ff13718ab0257ab7cc46f371727132cb247cd09df2efcef02108f192827fa610
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these sites, likely as a phishing or scam attempt. No scripts were extracted, but the presence of malicious redirector links is a high-confidence indicator 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.co/app/431946152/free-roblox-gift-card-codes-generator-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-game-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/comment-cheat-sur-un-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-into-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/doggo-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-valentines-generator_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/easy-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-package-webs_GM431946152.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
font_00_sfnt_off0000307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 22108 bytes
SHA-256: 24f2c5bc04b7b1a7a1817591e2e1ecda94d806ded8496bfedee351c8caf5d833
font_01_sfnt_off00006133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 19048 bytes
SHA-256: 3d7a0adcf13e9dea9e8f2f0fc1cf3a5558d53419abe84700d8d81e0220d35bbb

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