Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85f4a002c79d22d…

MALICIOUS

PDF

33.7 KB Created: 2021-06-27 21:04:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a72bb4528347ba818d1aab4084367dac SHA-1: 39bd14cbd7d21f0efd44673f2f8182a8e26b6153 SHA-256: a85f4a002c79d22d46ca14746e065bef3a536b00d32f5f1acfe7c627b3888195
160 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and Robux to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF files. The ML classifier strongly indicates malicious intent, and the document's structure and embedded URLs are consistent with a phishing or malware distribution scheme.

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/good-roblox-hacks-game-hack In PDF document text
    • https://shjbottle.com/upload/files/car-crushers-2-hack-roblox_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/broken-bones-roblox-hack_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/roblox-free-robux-april-may-2021_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-roblox-user-and-password_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-get-free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/roblox-re_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/roblox-download-chip-windows-7-free_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-hair-roblox-not-model-boy_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-download-roblox-infinite-jump_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/cheat-engine-roblox-weight-lifting-simulator_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-roaming-camera-roblox-script_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/robux-match_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/roblox-hack-ios_GM431946152.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
font_00_sfnt_off00002dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBF 22108 bytes
SHA-256: 49c96e306f9635e0806c6180eb2ceae23fe2ebddd70556b749da078a7bb65b26
font_01_sfnt_off00005f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 18828 bytes
SHA-256: 7c050b899f34bc90a0664308c3a92ec573202e8e847228701777d6ed2c97c86f

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