Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b42dfc2372b5c58…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 06:02:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a8c3e2e101385d391147956453bbed30 SHA-1: 2eab9e88670e4805f196991638e64c379bfa9757 SHA-256: 7b42dfc2372b5c58a99649b8bc9d32a6e749fc3e3d7a46f367175169b5557dc9
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 0.9865

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 https://netcdn.online/app/431946152/rbx-hut-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/links-to-free-spins-on-coin-master_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_off00004ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFC 26636 bytes
SHA-256: dea6a01cd52ac111fc5b0c9e8bb22885c5008815968e8752f40be68dae8a639c
font_01_sfnt_off00008ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA8 17812 bytes
SHA-256: e24951961dffee7128ae3d90f7f1153dbc58b347b85dc2bf38d5c1c57fa85777

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