Malicious PDF — malware analysis report

Static analysis result for SHA-256 437629516aa6be65…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 05:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3200605a587026a377ecc6038d73f0fc SHA-1: 2a7d54f941f2e51e69d513b89cc03db103cd81ca SHA-256: 437629516aa6be65cc3a875ef6da0956fdf2a87fa646ea5d40186f77b7389513
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and sites offering free game hacks, specifically targeting Robux and Minecraft. The document body, though partially corrupted, contains references to these lures and the authoring application suggests it was generated programmatically. The primary attack pattern involves tricking users into visiting these malicious URLs, likely leading to further malware downloads or credential harvesting.

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/how-to-get-free-robux-yummers-game-hack In PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/claimbox-free-robux_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-roblox-game-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-hack-site-no-download_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/mobile4free24com-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-games-pastebin-roblox-apocalypse-rising-2_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-cframe-cheat-sheet_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-games-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-robux-2021-new_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-get-synapse-x-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-get-free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/roblox-jailbreak-cheats-or-hacks_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/how-to-get-free-advanced-builder-in-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://digitalknowledge.pl/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-100_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off000050bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BF 25468 bytes
SHA-256: a4bab9e758c931739f1a5f6929c3db26cbf2e0e3762935c525ac15658fccc8d2
font_01_sfnt_off00008ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE0 18704 bytes
SHA-256: 874a2275b6b2c846eca3b5422940186e48ea216fcf22074cb9d35aae771dde33

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