Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e1ad4f59551576…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 03:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 156cdee159e5c4b6abecf995dc52981d SHA-1: 3728517a6a96e3dc5e9f8b3cafce4a65bb220ab2 SHA-256: e2e1ad4f59551576ec833d3ad02bedfbb0e4915815ebc7d49d6c3f5a8eb2f898
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and SEO-farmed PDFs, masquerading as game hacks and generators. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-fun-hack-online-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a lure for users to click these links, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-fun-hack-online-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hack-client_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/is-there-a-way-to-get-free-robux_GM431946152.pdfIn 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_003_off000049ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BA 24340 bytes
SHA-256: 12da79771cc0a7f59ed10f419d7fee31826cabd356a447e8abf045aca86890a9
font_01_sfnt_off00008174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8174 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C53 18092 bytes
SHA-256: cb92e27069aef3c0bc648d9f638bf08ddfa79cec59b13d8f3523a3f3131ac35f

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