Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ec14e026bc4a05…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 16:15:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7cca734e4e1121139f2d5d7912f217db SHA-1: 30d846250ea0ac94bbe6a089d062d7a82949eba4 SHA-256: 91ec14e026bc4a0536e2e684ac32b5787f839fc8384ac32c3e66d3728c679e9d
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate that these links lead to known malicious redirectors and are designed as lures. While no scripts were extracted, the document's structure and embedded URLs strongly suggest an attempt to trick users into visiting malicious sites, likely to download further malware or engage in phishing.

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/479516143/minecraft-18-9-hacked-client-game-hack In PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-use-cheat-engine-in-2021-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-free-stuff-codes_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-april-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321C 21976 bytes
SHA-256: 5652b7b28e7c070e83c6adfaff5dc53c933ed1230060da1a5fdb5311a2a19ecf
font_01_sfnt_off00006277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 18756 bytes
SHA-256: bc7ce539429de417ba0394b3a553ba382b302f8472751b99fb4c21ca42080eae

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