Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caad86dc35ab8dc…

MALICIOUS

PDF

48.4 KB Created: 2021-06-11 11:53:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: da564ad953cf0c70a8394e6628b5f288 SHA-1: dbd28465c3e841a2529d0ba363ecf3c7824c9f30 SHA-256: 6caad86dc35ab8dcd50c6f4608c5ef3296ebc8e811ba3558699c33a8db7c6da7
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and malicious infrastructure, masquerading as a "free generator / game hack" lure. It impersonates the eBay brand, suggesting a credential phishing attempt. The embedded links likely lead to a second-stage payload or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/comment-jouer-a-roblox-avec-une-manette-free-game-hack.
  • 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/comment-jouer-a-roblox-avec-une-manette-free-game-hack In PDF document text
    • http://schrichte.de/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/what-to-do-if-your-roblox-account-gets-hacked_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/robux-hack-no-human-verification-or-offers-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/ispoofer-pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://schrichte.de/images/bandit-roblox-free_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-coins-coin-master-2021_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_004_off00005286.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5286 30756 bytes
SHA-256: 2be5be83238364e2d6cc4adfa665cd7b2dbbdba955ec24dd372f5a521a7ca0ea
font_01_sfnt_off000097c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C5 19340 bytes
SHA-256: 06a9f9cd63c367d6f975995f1d13550816e910524f64a719fbd63dc4a75df3e9

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