Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4852854d2d20ea…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 01:14:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7d692affdc24f9b019889f68406a4d88 SHA-1: 6bbc66d5f8835a88f08f95274a72af25a6f65649 SHA-256: 5b4852854d2d20ea71be7fe5769332ddd36f9d8ee43e6b1bbc9e76361d851aef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for free game currency and hacks, directing users to a known malicious redirector. The embedded URL is a primary indicator of malicious intent, likely leading to further malware or phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/get-2021-free-spins-on-coin-master-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-minecraft-printables-food-labels_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
stream_003_off00004cad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAD 25436 bytes
SHA-256: cebe11d842dfb97bd0a05e5478fe8c1144c27a87070616a8f6669b7d0fd850f0
font_01_sfnt_off000085e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E0 18288 bytes
SHA-256: 882c1e08e977239ecedb915e199b33d6770e962ab42e0389920a883bc9e88219

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