Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a6c41276aceae5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 19:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: be26aa4d065e08cb79c453740755fe14 SHA-1: 988eaedc65a700b7472a564b2f3f2b6f4311a47c SHA-256: d2a6c41276aceae503aa856ac6ee61787287e4d8b9bcc0aeb6b8756a04d603bf
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. It contains numerous links to redirectors and a link farm, designed to lead users to potentially harmful websites. The document body and heuristics indicate a clear intent to redirect users to external, malicious infrastructure.

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/431946152/free-robux-meme-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-phantom-forces-money-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-robux-generator-2021-without-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/the-most-opiest-script-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/do-you-get-free-robux-when-you-work-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-promo-codes-for-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-remotes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-games-for-free-no-sign-up_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-free-robux_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_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22632 bytes
SHA-256: d4d77ce67410da953f15defd621d478ba6faea19c07ec59ecbf764cbaa8b9125
font_01_sfnt_off00006114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 19172 bytes
SHA-256: cc6f39551398ec7556c1100a0df569da4eadcef96f4621f512d193548eed02ae

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