Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b28025554bf1f20…

MALICIOUS

PDF

46.2 KB Created: 2021-06-10 23:24:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 012c2f5f922975b7cb6dd5cd37e9f7ff SHA-1: 78c1e121ce765a18065dce2757046a8e567944f1 SHA-256: 9b28025554bf1f206294255af7bb53ad1555313f9bb087dbd6668b09be24e36b
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free Robux' and 'game hacks'. The document body and embedded links suggest a lure to trick users into visiting these sites, likely to facilitate scams or distribute further malware. The presence of numerous SEO-optimized PDF links further indicates a campaign to drive traffic to these malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-robux-javascript-2021-game-hack In PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-hack-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-generator-november-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-do-you-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-2021-easy-not-working_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-avatar-animations-roblox_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/roblox-grand-blox-auto-2-all-cmds-hack_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-codes-2021-march_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/speed-run-4-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-money-roblox-audio_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-adidas-pants-roblox_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-hack-on-roblox-murder_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/In macro / runtime command snippet
    • 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_off000055b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 24844 bytes
SHA-256: e7c2f64ca528cafe74f41d8e2673b03751c5eae424c57dce28dcd20af62d1402
font_01_sfnt_off00008ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED8 19324 bytes
SHA-256: 3a47f1fea234440bd0d6ac36277933044308e1a2100b126da87238770a858060

Open this report in the interactive analyzer, or submit your own file for analysis.