Malicious PDF — malware analysis report

Static analysis result for SHA-256 4631034d01f15128…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 08:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c44cbc8d43a70f564be32f42353b75f9 SHA-1: 14c8934b7a67ae34bb6b04f24a0802a6b5af70b3 SHA-256: 4631034d01f1512829113cc0a7e6661925a9276915452c01e5be8ed78715d938
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.tw/app/406889139/best-free-spins-link-coin-master-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/pokemon-go-free-promo-codes-june-2021_GM1094591345.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-purchase-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-no-verification-or-offer_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/call-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-use-hack-on-roblox-with-admin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-codes-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-in-cheat-ingine-work-in-pizza-place_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-daily-spins-today_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000338b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338B 22980 bytes
SHA-256: 15dbffbc4e0ed31feb8f3158a6b1cc120d2f3253244946e5cdd073fc6eb47bd4
font_01_sfnt_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 18560 bytes
SHA-256: f4e5c5d747b0ffea5d5709502c5f789dc406614ec4bfae31758420bcc4675b97

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