Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bc0d43afd3f1b4…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 14:56:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 444ac69a47cfee28e6a005ce325b23be SHA-1: 9ebc86e0cdcc27d2645bce996f2295ec16e95d12 SHA-256: f7bc0d43afd3f1b409e67a0d9f9569be51317c061fc5906e5570e75515030662
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, including a known malicious redirector, disguised as game hacks and generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-make-free-models-on-roblox-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-items-in-the-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pokemon-go-free-codes_GM1094591345.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-one-piece-ocean-vogaye-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-codes-2021_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_004_off00005263.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5263 24964 bytes
SHA-256: 404d33d545fc05a807a3fef8961f2552cd3c5b494c54ab45992715a358393cdd
font_01_sfnt_off00008bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 18880 bytes
SHA-256: 3c1c7202777e055d0b83b75d27cfe94fe9e0a5f2a6267846e42c0f1cd0aa2084

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