Malicious PDF — malware analysis report

Static analysis result for SHA-256 3107d79ac6dffe88…

MALICIOUS

PDF

35.8 KB Created: 2021-06-20 02:15:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 48df98534b9d8ce7a53d938e91544974 SHA-1: e325274498ef71f59fd8c9c7628958c59a3dbbcc SHA-256: 3107d79ac6dffe88216a098b0bd6af12d43c2f80fe4c451b99d44582e7e82432
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The primary malicious redirector identified is http://netcdn.co/app/431946152/comment-activer-cheat-code-roblox-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a lure for users seeking in-game advantages, likely leading to phishing or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/comment-activer-cheat-code-roblox-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/how-to-join-the-builders-club-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-infinite-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-roblox-non-infect_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-in-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/ssuper-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-spins-coin-master_GM406889139.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_off00003343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3343 22552 bytes
SHA-256: 4e0bc2d5ed8c32cc6fd4472bd26a76a6c5caa683543a31720819758845011278
font_01_sfnt_off000065ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CE 19424 bytes
SHA-256: d006e4895383b0adfa100895666cb5a33ea154c8d36b02a1d6e06143add74749

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