Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbc7aa2dbcca2a1…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 12:26:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e95a5f622a315e25b49e8b4c7e69cf45 SHA-1: 35ed7a79b22a089072e63e8273a518083b0c4731 SHA-256: 3cbc7aa2dbcca2a116d31b0b5d2d5103182b8ada0ec20a9e5729e0400e3b6529
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to websites offering "game hacks" and "free generators," a common lure for phishing or scam operations. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures strongly suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/431946152/watch-videos-for-robux-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/boxing-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-scripts-pastebin_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
stream_004_off000051bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BC 27536 bytes
SHA-256: 70091edaae30a9338aed92d9679094b261518b226a6bb3605a241a2afdf5f724
font_01_sfnt_off00009111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9111 19140 bytes
SHA-256: 301f4b72018bde41591ea9383aea6da8578dd4e8b92e993503a568e91431ca36

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