Malicious PDF — malware analysis report

Static analysis result for SHA-256 b386170279a77df6…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 19:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0d451dcf4c81c0c02371853236d372aa SHA-1: 743350a914db960655457d32c4805c6ac734af76 SHA-256: b386170279a77df65b4a77974153f665e508c6d31a74100e2f547be71857a4ae
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links designed to trick users into clicking them under the guise of a fake CAPTCHA or verification prompt. The primary link, https://netcdn.xyz/app/406889139/100-free-spins-on-coin-master-game-hack, is associated with a game hack generator lure. The document also hosts a large number of other PDF links, likely part of a link farm, which further indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/100-free-spins-on-coin-master-game-hack In PDF document text
    • http://viemeo.fr/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spins-hack-download_GM406889139.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_off0000466d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x466D 24672 bytes
SHA-256: a74c08c6bdb9c4183c21fa7f875ac2a229871e8d0c01236259e8654edea5eb08
font_01_sfnt_off00007ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 18164 bytes
SHA-256: bbb0863b6b56e230973ea45e87d56f99f1d326b285d23dffe78eb4756b106867

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