Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6f6c54ea13cff9…

MALICIOUS

PDF

43.1 KB Created: 2021-06-04 02:52:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 250a61452fee2e1b0d9c96c542d5460a SHA-1: 339571d12a5009e0638e8d6c7b7e0c332298b349 SHA-256: 2c6f6c54ea13cff9bcd7a66c76d055b1456f6aba1f24bc32abdeca1337c5fe02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/479516143/how-to-get-minecraft-coins-for-free-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pokemon-go-free-joystick-ios_GM1094591345.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off0000510f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510F 24152 bytes
SHA-256: f5910cfa1752a342d0ae12c650446eb9550f4c75efbd20bcfa1e9c90aa57eab6
font_01_sfnt_off00008701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8701 17872 bytes
SHA-256: 0037a1fc045e764a0a06593ed58f76bf502c93e6708a03a1db6b693a2071c675

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