Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7166e09e8cae3f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-19 09:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2b593f1d382696fdbf1b296b12785e7 SHA-1: 6ef3eef260d3b51daa415ebe2ece07c57dbbbc75 SHA-256: 2b7166e09e8cae3f76d0b02d4fb6098499839a142829530b768f21448e08a155
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a known malicious redirector. The embedded URLs and the primary redirector URL are indicative of a phishing or scam campaign designed to lead users to potentially malicious content or further compromise. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/431946152/robux-hack-tools-game-hack In PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-premium-roblox_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
stream_003_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 27032 bytes
SHA-256: 274f4d547b622c38770e89c972a39e54360952392c4be9fb0c65588b1e6a0f2e
font_01_sfnt_off00008643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8643 18320 bytes
SHA-256: cf6d0fcc2a7c18e0ae1e84145e037068603b130caaef77e993c358e364abbe1e

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