Malicious PDF — malware analysis report

Static analysis result for SHA-256 85529f289ab823bf…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 08:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 72d3849f2865a0ae694c370b7797f1c0 SHA-1: 6baab16f8b8b22b66d5ed35fb03cc2e377bc7488 SHA-256: 85529f289ab823bfc7e5f18df17e7e3fff00c6eb7b4c1668a288cc3b1555aabf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs pointing to known redirectors confirms a phishing or scam attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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-games-to-play-roblox-game-hack In PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-tp-to-me-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-hack-roblox-accounts-on-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-get-free-robux-easy-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-roblox-boy-clothes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-hack-scripts-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-build-a-boat-for-treasure-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/money-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/minecraft-svg-images-free_GM479516143.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
font_00_sfnt_off000033ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AC 22688 bytes
SHA-256: 23bb48ebc6c64cbe05a4d9541e422c98333a7528eced38369245b2a873705a77
font_01_sfnt_off00006680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 19060 bytes
SHA-256: fe8706fbc2cc225a6decfe514d0a2db788a88e1dd1efa3e13f5cd17d4aa0177c

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