Malicious PDF — malware analysis report

Static analysis result for SHA-256 2676ac14198d7c78…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 04:49:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bc7e547f8dac11fc5abd8a8b05b7958a SHA-1: 093c58df9af5b362035715a28cb7ed1c787dca14 SHA-256: 2676ac14198d7c7846eecfa833c11374d82bb9c3cd0586ad365468989ac5c18d
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be free game hacks or generators. One critical heuristic indicates these links point to a known malicious redirector infrastructure. The document body and embedded URLs reinforce this lure, aiming to drive traffic to potentially malicious sites. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/get-free-clotyhes-pon-roblox-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-password_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/game-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-gift-card-codes-2021-live_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/download-cheat-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/websites-that-give-free-robux_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_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 21908 bytes
SHA-256: d164d33ba46496242e733fd3fce4daa652077cc3e26c58d0223992f3de7f720a
font_01_sfnt_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 19256 bytes
SHA-256: 26347654d53cc7aa3ea2e02a9d376cf6c5a85aa82a0db89b5eac95b7547fb634

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