Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a8cd80904ba819…

MALICIOUS

PDF

45.0 KB Created: 2021-06-07 06:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1cd1c1a609123899e0d2cacfcf60375f SHA-1: 83457e907d58ee2a3b4a7349186481897e14b325 SHA-256: 04a8cd80904ba81992a3b615a4bc92739be3b6b7ef983e4778b5fe6c89b6e8ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains links to known malicious redirectors, specifically promoting 'game hacks' and 'robux generators'. The document body and embedded URLs suggest a lure to download potentially unwanted or malicious software. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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/roblox-hack-robux-2021-download-game-hack In PDF document text
    • http://iricamidelcuore.it/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://iricamidelcuore.it/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://iricamidelcuore.it/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AC 24632 bytes
SHA-256: 48426e4b49e86885ef373c1cc4f15863657068106edfeba1dc185f1b97d9740c
font_01_sfnt_off00008a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A54 19228 bytes
SHA-256: 2d88d7428d26baa9c92ef95e203571f007c0a02ba2caba7fa0f434932cbfe3fe

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