Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a7b25b48c4a86…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 12:21:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5bab89f86c1ddaa26144b940b47ae317 SHA-1: f005074b78aa00d808ad7d7e7027514f7eba290c SHA-256: d26a7b25b48c4a86355ea29007cd89b13ac3eb985b64fb3e49ddbc3f76c4b121
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links designed to lure users with promises of free game hacks and generators, redirecting them to malicious infrastructure. The presence of multiple links to potentially malicious domains and the ML classifier's high confidence score indicate a malicious intent to lead users to harmful content. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/479516143/is-minecraft-free-on-pc-game-hack In PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-robux-on-iphone-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/tiktok-free-like-bot_GM835599320.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/google-coin-master-free-spins_GM406889139.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_004_off000053aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53AA 27888 bytes
SHA-256: 4718b52ef6583960c2663e6b6cafdce4a70a8fab0116624df119ebe667fd4038
font_01_sfnt_off0000928b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928B 17724 bytes
SHA-256: 0ab36ec9301b9393cdac417675da6d9cb227c8d57ccc288e3f382d638798bb6c

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