Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a723e4edaebb1f…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 18:08:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b4e00a53a1ee7bfbcab1398fe32bb662 SHA-1: a2d46011d055f5216a8cc928bdba0d8216586fb3 SHA-256: 79a723e4edaebb1f60dcb22a261c4aee70fbb47544f65c1040c34229b559cfb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings confirm these links lead to known malicious redirectors and a lure for game hacks. While no scripts were explicitly extracted, the nature of the links suggests a potential for downloading further malicious content or redirecting to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/rbxvault-free-robux-game-hack In PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-on-roblox-2021-working_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-sprinting-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-clothing-group_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-hack-snow-shoveling-simulator_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-to-vbucks-translator_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/money-hacks-for-rocitizens-roblox_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-spin-in-coin-master_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_off00002e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4D 21464 bytes
SHA-256: 59780091340dec764219814521f82dd0788de51d1dca77ed814db81ab856ec94
font_01_sfnt_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 19008 bytes
SHA-256: 4293cabfedeb9a6e62bbacdf7d0aae3b34dd61a6bc919545b30e811d67926b97

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