Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f88b300fa4ac9b3…

MALICIOUS

PDF

45.4 KB Created: 2021-05-30 13:39:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d9a8ba9be421ab6aa8860a132d22b228 SHA-1: 001e962cda64a4943d9f152fd4cab9a16941269d SHA-256: 3f88b300fa4ac9b3c52b6f8dd5965504e7c16da57ddc4267078ac111fb9e8fdb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering free game currency and hacks, with one primary link identified as a malicious redirector. The document body and heuristics indicate a lure designed to drive traffic to these potentially malicious sites. While no scripts were directly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-no-verify-game-hack In PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-codes_GM479516143.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_003_off00005251.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5251 25908 bytes
SHA-256: 6fffda47715328a60e6c19b4a909b6cc1cb9f8cb9179a03b545b34de54793955
font_01_sfnt_off00008de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 18448 bytes
SHA-256: c82a2e535d1b02ce633786be567827726fc21df48f71ae9cb05a1d9866072f5e

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