Malicious PDF — malware analysis report

Static analysis result for SHA-256 67541378eb1bf8e2…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 06:39:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9d498107c092b7cbc69ef0bc63dc1fb7 SHA-1: 3a2f6e16993992ce060c8a7539be6b27148869d7 SHA-256: 67541378eb1bf8e25de2ae7ff48e51930ff75115d58960d4dab37f2114776131
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to lure users to external sites, including a known malicious redirector. The document body and extracted URLs suggest a scam related to game cheats and freebies, likely intended to lead users to phishing or malware download pages. No scripts were extracted, but the overall structure and linked content indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • 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.
  • 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.online/app/406889139/coin-master-freebies-2021-game-hack In PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005157.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5157 25556 bytes
SHA-256: 05a3685e70ea6cccfa0849523b98e1dd0b8317325034f8b5c8d8a7841d2e785c
font_01_sfnt_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9559 18272 bytes
SHA-256: 1bcb593477ee65390748ab733566666577cbeb3f4a2efe23a42d3af4bd8bc672

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