Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb0c82f3318d74c…

MALICIOUS

PDF

46.8 KB Created: 2021-05-13 18:59:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef6a1120d6e1a9211ee69a61d8c0099a SHA-1: 89cfa6c8b1a6506500255ad7c38fe42f5bcbb7cc SHA-256: 5bb0c82f3318d74c4f794451dd0e8f979238f47002328646ecac7b1e4bdd1787
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/master-free-spins-and-coins-game-hack In PDF document text
    • http://uctaren.eu/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://uctaren.eu/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/roblox-group-free-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFE 28720 bytes
SHA-256: 2739a766472721303c0568435b9c3c5addd68bc44648a3a608912a1bd6de2bdb
font_01_sfnt_off00008b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00009557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9557 18060 bytes
SHA-256: d06b9f6ce8bbd870629f12123efeb620bcd0bbcf70b73364bfc805fb6b1b694d

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