Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4f43df9ad5cfd2…

MALICIOUS

PDF

36.6 KB Created: 2021-07-08 01:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c390e930e6afe6e4457c948ec38241cb SHA-1: 1bec37ea8e723437ae846844f1b4782317d33b7b SHA-256: fe4f43df9ad5cfd24ed4768eaab6b91bb537c64128a6bdd3c0bc801632671120
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing tactics to attract users with promises of game hacks and cheats. It contains numerous links to external PDF files and a redirector URL, indicating a likely attempt to lead users to malicious content or phishing sites. The presence of embedded URLs and the structure of the document strongly suggest a malicious intent to redirect users to potentially harmful resources.

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/archery-master-3d-hack-unlimited-coins-cheats-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-2021-android_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/blonde-action-ponytail-roblox-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/descargar-roblox-hackeado-para-pc-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-free-phantom-forces-account_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/inf-health-script-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-my-hero-release-boku-no-free-code-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-robux-free-iphone_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robux-hacks-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-hair-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/rewards-robux-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/como-hackear-una-cuenta-de-roblox-a-un-amigo_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/clash-royale-legendary-cards-hack-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
font_00_sfnt_off0000368f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x368F 22632 bytes
SHA-256: ba6a18c1ef19c690e40ada4c2f5028ecdff6b474c0b7ef4af0ba13824b72e087
font_01_sfnt_off00006938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6938 19384 bytes
SHA-256: 6d80dce4fa699b9076a8b175d16ed475ccfb6ff0dc0169280df9c553a7f08f53

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