Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc971c464f807f8e…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 11:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cebe8d25be833feda06f38d79213538a SHA-1: 6fda2633200c52bf048331f163a7963c9183e07a SHA-256: dc971c464f807f8e5817452b5e2e74c50fdc7f665f41e8505cfa44e18b3c5376
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to PDF files related to game cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to potentially malicious websites or downloads.

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/431946152/free-robux-2021-game-hack In PDF document text
    • http://farmaciaisella.it/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://farmaciaisella.it/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/show-me-how-to-get-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A1 25788 bytes
SHA-256: d4b5b47e20a28f23a71fef7268567005e84e83f133d5d82f74dd806244b2b867
font_01_sfnt_off0000833e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833E 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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