Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8ccaca98518c4a…

MALICIOUS

PDF

45.4 KB Created: 2021-05-17 14:02:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ab7fb6129ae28be3dff7d416dcfd9924 SHA-1: 2db07bce6f1af4d0c2ef6479596c845410c3639a SHA-256: 1d8ccaca98518c4a85420dc274202cf1e8fb0b21fad11c2607ed980babe022ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are identified as malicious redirectors, specifically targeting users with lures for free game currency and hacks. The document body and heuristics confirm the presence of these lures, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/free-robux-without-survey-game-hack In PDF document text
    • https://www.tdbaska.hr/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-pin_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_003_off000048a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A2 25512 bytes
SHA-256: 0d9863ea8c7c3feed421de383a806da970e00e0a87e2b38b87b5b7a359aa8475
font_01_sfnt_off00008303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D13 18896 bytes
SHA-256: b0c1a7c96aa264be318e1ab456a0b915a72e0bc05fcf36e1ad74b726c9d43bb5

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