Malicious PDF — malware analysis report

Static analysis result for SHA-256 82499e71f1fc9e22…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 17:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a3b6f4ce27ce98300b29227a84228bff SHA-1: 4b772a2e7e23369609dc29b084f75a220c8a708c SHA-256: 82499e71f1fc9e2219a79c78b2e054053ae08967fe1d3cde52a97c121e1ebd12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, as indicated by the document body and multiple heuristic firings. It contains numerous embedded URLs that point to redirectors and other potentially malicious PDF files, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of malicious links and the lure strongly indicate a malicious intent.

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.tw/app/406889139/hackear-coin-master-2021-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • http://library.atim.ac.id/repository/fray-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-no-virus_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/pokemon-go-free-zaragoza_GM1094591345.pdfIn PDF document text
    • http://library.atim.ac.id/repository/noclip-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-hack-instantly_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/can-you-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/gain-robux-no-hack-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-for-ios-and-android_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/lyce-de-roblox-2-hack-directeur_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/factory-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/june-29-coin-master-hack-no-human-verification_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_002_off00003668.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3668 23516 bytes
SHA-256: 2a22a1304c5d4541b094331c519b2721cc738eac01eae82995f95342d37fd186
font_01_sfnt_off00006b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B91 18408 bytes
SHA-256: e12145284ed43bacda9ea04b287d11ad422f80f0b9ba3e5eb455bf472c7ad3e4

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