Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ccab37862ff064…

MALICIOUS

PDF

45.4 KB Created: 2021-06-07 15:30:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1a4e3fbec1959a157cc158dd5d37fe42 SHA-1: 6dc8d0ea8bb3f30d378aacdd03f80a9b8969348c SHA-256: 25ccab37862ff064d51d2ad555ed8dc2ebceff77b472590276a15f01173ba3fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as a lure for free game currency or hacks. The document body and embedded links suggest a phishing or scam attempt to redirect users to potentially malicious websites. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious workflow.

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/431946152/how-to-get-free-robux-on-phone-no-download-game-hack In PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/cheats-in-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/play-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/robux-adder_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/hack-coin-master-apk-download_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_off00005063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5063 26484 bytes
SHA-256: 574114de4552aeb3f2021414549b3547465d5b4af6d075b095c3bb7d4904ae72
font_01_sfnt_off00008c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 19244 bytes
SHA-256: 7d9faffa009fba57a020cbb4376ab197ac570d78f432cf9b8caac469ee062cad

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