Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1b1ae09cefcaea…

MALICIOUS

PDF

36.2 KB Created: 2021-06-23 16:12:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf0c53ac8db4748422357156896fee43 SHA-1: aa739d2140795573187e4d2b4844bf0e1834ed52 SHA-256: bd1b1ae09cefcaea5b2ea3e17c5f4b46cdeca99e0e5bd8845049ddac1949e46a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with one specifically identified as a malicious redirector leading to a 'free generator / game hack' lure. The document body also contains the same URL, reinforcing the phishing attempt. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to malicious infrastructure.

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.co/app/431946152/free-robux-sites-that-work-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-assassin-hack-exploit_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-play-roblox-free-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-any-gamepass-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-100-works-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-gift-card-roblox-giverway_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-co_GM431946152.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_off000034bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BC 22648 bytes
SHA-256: 76f72041e97b693d72a849439928cde604005bd6b81b2874d71501737f796ba3
font_01_sfnt_off00006745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6745 19472 bytes
SHA-256: c870e848b7333530fcf3a181653402c0177c63a978227bac510a2a158669bcb4

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