Malicious PDF — malware analysis report

Static analysis result for SHA-256 8840c617f56118b7…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 21:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10a770bb7126a08754b78744e2da1577 SHA-1: 22e4013c305a016fa7fb9f2b59c3f12d25d97a7d SHA-256: 8840c617f56118b799923b7bcb37fceb2c9cc3c8803b19a2424774546f809628
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/hack-coin-master-apk-mod-game-hack PDF link annotation
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/roblox-project-pokemon-cheats-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-2021-2021-account-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/infinite-money-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/pastebin-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-game-hack-kaise-kare_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
stream_002_off00003386.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3386 22700 bytes
SHA-256: b43ffb6ee26de90414fe6a79b9046830571ef0adb32c8938dfe2f34729c44649
font_01_sfnt_off0000663d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 18352 bytes
SHA-256: cbc4e4e1d1bb734107fc5d409ab149651d88467a261092654a59e8786ea3a6d0

Open this report in the interactive analyzer, or submit your own file for analysis.