Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b84e9e17e8c4098…

MALICIOUS

PDF

44.5 KB Created: 2021-06-10 12:52:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 373015ab25d09fc149bd49acc3b96a94 SHA-1: a7793e80f125c632318445d92d6046f2b7da4ebf SHA-256: 4b84e9e17e8c4098e1e2c4742d351181349128d2859efaa4b857f2fdd8e5a49a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary function appears to be directing users to malicious infrastructure, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-shavaka-roblox-id-game-hack In PDF document text
    • https://inspiration-modellbau.de/images/roblox-catalog-free-stuff_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-prison-life-v2-02-hack_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-project-jojo-white-snake-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-roblox-trolling-tips-for-frappe_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/earn-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-cheat-for-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-install-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-do-u-get-free-robuxs-on-mobile_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-no-anti-bot-verification_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
stream_004_off00005013.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5013 25056 bytes
SHA-256: d1f21074a52dbca6da8665d503a82dae0a4be2ebb623befb1e897e648622385d
font_01_sfnt_off000089bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 18800 bytes
SHA-256: d0f8f0f546938330f44bb718db6a103fc9d7b00e094d10b01d15b6458765655d

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