Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b22c38652d8316c…

MALICIOUS

PDF

49.9 KB Created: 2021-06-09 15:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a5332d79f4045df283686e6502c5acaa SHA-1: cb4a92f1ee76b816f88ef9d815bdfe2297198a65 SHA-256: 5b22c38652d8316caffb1923572bce3eb4450ea3b35de68a8c0ef787e7951cae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document body and embedded URLs suggest a lure for free in-game currency or cheats, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-super-power-training-simulator-hack-game-hack In PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-codes-9-3-19_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/guava-juice-free-robux-promo-code_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/rewards-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E0 26532 bytes
SHA-256: 9898decc3ed81effbf501f3e83eeb7d385144f758e48ae680aeed29ac6104ef2
font_01_sfnt_off00008f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 19588 bytes
SHA-256: 1713745793c2061039ef46b4511368c106eab4cd71316df199aa688a2161d378

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