Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c627c061fcc559…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 16:58:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d984473393f7cc29cc930910befca7f4 SHA-1: 1b58c5211271ad6d95a6872a5a863bc3774b1bee SHA-256: 22c627c061fcc5592493fe503bae14070959d15a88935096f624993efa2ccc43
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.co/app/431946152/videos-de-como-ser-hacker-en-roblox-2021-game-hack PDF link annotation
    • http://schrichte.de/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-money-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/roblox-cheat-robux-free_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-get-free-robux-card-code-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/comment-avoir-des-robux-gratuit-sur-pc-hack_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/youtube-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/veil-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00002f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F01 22908 bytes
SHA-256: 85850e970c515416b5af41fd6667dd9affbd4dd71e27431db6d7af245f2ba3f9
font_01_sfnt_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 19728 bytes
SHA-256: 61c4d1120aad982cb33045de09a396231ffe8d1ed33fd7450aded66c8edb23b3

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