Malicious PDF — malware analysis report

Static analysis result for SHA-256 417faedd34f02ba7…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 00:50:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6c410254ca377067cc0a0cfb60895ac7 SHA-1: 09c7c2119b9b9eefe16478a71388c1a2c65de9e2 SHA-256: 417faedd34f02ba76574b1f949846fbdc43d19c5dc499c898c280b5c66ee4168
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO link farms, including the primary malicious URL https://netcdn.xyz/app/406889139/coin-master-gifts-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-gifts-game-hack In PDF document text
    • https://kinderdam.nl/images/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-root_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_003_off000049ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FF 25712 bytes
SHA-256: 1f1dc6b1456490643f97f68abb9fc218c5a772ef1ae37088fe2d51a8635acca1
font_01_sfnt_off0000835c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 17544 bytes
SHA-256: 4fccc7f2e5b87b3b3bbfe27ac594c5d73c76fe2ff8079911e64f341337cd8bef

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