Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9a9d6a92809808…

MALICIOUS

PDF

34.7 KB Created: 2021-06-23 17:17:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6cc56410bda760c61673fae5c4d1c1f6 SHA-1: 9f8e4b208ed90181af78887da9a321e0546b37ba SHA-256: 2b9a9d6a928098083f6aea48d8f6cc12027848f42debb4c866fc3bcc047d8023
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and SEO link farms, disguised as generators for game hacks and free currency for popular games like Roblox and Coin Master. The document body explicitly contains the URL for a malicious redirector, suggesting an attempt to trick users into clicking through to potentially harmful sites. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or scam lure.

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.co/app/431946152/roblox-my-hero-academia-online-quirk-hack-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-promo-codes-2021-july_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-coes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-tix-on-roblox-no-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/admin-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-free-coins_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-ios-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-hack-client-download-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-2021-apk_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_off00002ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF2 22192 bytes
SHA-256: 713846592fa65f44fa330ed384c20484626f3827819750b456b94de355de6385
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 19884 bytes
SHA-256: c386273f4771854bdfaced8f1a8bc5e4a5a1cddf616b701fa5423275dd4fd565

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