Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a05cecb25835a8…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 05:50:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d7f8a20a4c27a0d18c16cff9cb0042fa SHA-1: 6b1fbc71023d72405ddd15d84b7d152af60ec61e SHA-256: 27a05cecb25835a838bc011ed6bb9ec111ab2b496027b03678468a83489514e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-apk-game-hack. The document body and embedded links suggest a lure for free Robux or game hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-apk-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-muslce-tshirt-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-using-tampermonkey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-spongebob-shirt-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-money-lumber-tycoon-2-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-do-you-get-free-robux-on-ipad-mini_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/lumber-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-cheat-in-lumber-tycoon-2-roblox-axes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/give-me-free-robux-google_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 22400 bytes
SHA-256: 210124cc4bbf2db00010f6013413650595e1d09917a2108a3e22923e348c64a4
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 19064 bytes
SHA-256: e83e6ec4c124ed2d7ca7106d3550dd0cc1129fb3ff046dea9d423b5a0bd21ead

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