Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e672d3926e6bded…

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 23:13:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d16c1ae8719138431cc0c443d82417b6 SHA-1: 6daee6b360c3c62b835ae44f3024594304af940a SHA-256: 7e672d3926e6bded9ccfa7f890e2bda3ef0e99ac92d5ce548743ee7ce56509ae
220 Risk Score

Malware Insights

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

This PDF document is designed as a lure, employing themes of game hacks and free currency to trick users into clicking links. It contains numerous links to external PDFs hosted on SEO link farms and a known malicious redirector infrastructure. The document body and embedded links suggest a phishing or scam attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.tw/app/406889139/coin-master-tiradas-gratis-2021-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/all-players-in-robloxs-passwords-password-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-adidas-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-labeled-cheater-in-roblox-parkour_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-hairstyles_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-de-roblox-deathrun-descargar_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/tiktok-free-zone_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-bc-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-vip-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-by-playing-games_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
stream_002_off00003333.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3333 23616 bytes
SHA-256: 665a3c37962757ca1dc0070aaced195bab31810ba1bf36c0a971e708700edf4c
font_01_sfnt_off0000687e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 18412 bytes
SHA-256: 205f02078e44dc7cbfbb8341c4d4cb1c387440bb67eb4bb631bd87716442abcf

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