Malicious PDF — malware analysis report

Static analysis result for SHA-256 0952a0b2172f8df7…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 08:27:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 98c1a17dac5359f3cefc83319fe7f9c0 SHA-1: 09dcdbed38914cede26fdbbcbacdf77e9e6e88a4 SHA-256: 0952a0b2172f8df71a0558f2ac6bd74e34706da96943b6ad8267563f21b167b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.online', which is flagged as malicious infrastructure. The document body and embedded links suggest a lure for game-related cheats or currency, likely a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/hack-coin-master-free-spins-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/village-4-coin-master_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_off0000516e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516E 24800 bytes
SHA-256: 619ad0b6036d4193070f9f3c267aa6f25aaa9d5f2a3cdc192c94e3d59d379f1f
font_01_sfnt_off00008924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8924 18056 bytes
SHA-256: f90826bfe2bc71c0265d319a9184b169c06436e7d3915f152a6a7ecd0e51099f

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