Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f803ff6f113ab6c…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 07:20:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c4bbb3db8bce477e34843a4e2bdb1094 SHA-1: 1abb3790703dcc058a3c74160698a6386a81b134 SHA-256: 1f803ff6f113ab6c790e6e8903b6aad059bbdc0d7190615b08b898d6a0b935b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-mods-download-free-game-hack PDF link annotation
    • http://osteonad.com/images/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://osteonad.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/robux-apk_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/how-to-get-free-robux-2021_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
font_00_sfnt_off00004973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4973 25180 bytes
SHA-256: c87d3d84493b9a296024c409849c4da6a3c98e76ab9c05c79eafd157ea36fd0a
font_01_sfnt_off0000821d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 18292 bytes
SHA-256: cdbcc94192cea0c1a32d76b4e8648406db092070658ebd9590606dd52a123660

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