Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c2a442b0060842…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 10:00:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fa0684571a1cf6db8824f70a32cff7ab SHA-1: f69ea7ff619f6f79730b870ca083980d4e603584 SHA-256: 55c2a442b0060842cb13a29fbab37152e79d278a4c7829ac286b65b79427b9cb
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and in-game currency to entice users to click on numerous external links. The document contains a large number of SEO-optimized links pointing to various game-related hacks and generators, suggesting a link farm or phishing campaign. No scripts were extracted, but the presence of numerous external links and the 'game hack' lure indicate a high likelihood of redirecting users to malicious sites or potentially downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-hack-stuff-in-roblox-youtube-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-clothes-from-stores_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/i-finally-found-a-game-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/images-of-jhon-do-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/fre-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-often-pubg-uc-benefits-paid_GM1330123889.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robuxs-by-bananaman2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BB 23004 bytes
SHA-256: 479f15029fe7e95b1210f7f45f570026c6aff306dccba6272405e0ae4eac9653
font_01_sfnt_off00006562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6562 19228 bytes
SHA-256: e7aad0cead7a5a800253fb67c3e6423cd78dd524cad7bd18d8b2dbadfe03768e

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