Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f77ad5c623b99fd…

MALICIOUS

PDF

53.5 KB Created: 2021-06-10 14:55:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 32277e95f25041a19e097df926818b41 SHA-1: c4d89fe2ce89c98965addbc53ce5c27a55e13924 SHA-256: 7f77ad5c623b99fd90524c967ddf937462b309153375ac913816ca8fd6387f16
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as offers for game hacks and currency. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely leads to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9588

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/free-roblox-adder-game-hack In PDF document text
    • http://montchanintt.fr/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-hack-pro-gamers_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56DB 26420 bytes
SHA-256: b69eb79d6a3625aa840ee2af3ab00ad6f39b00cb4fe4bd2946dab081388365c1
font_01_sfnt_off0000945a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945A 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off0000af29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF29 18124 bytes
SHA-256: 0c3cec4f37b7ee87eb16dd564b1b8b96b1ed75911dbe5c468c52035a61bbafa9

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