Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ada0b7414de5bd…

MALICIOUS

PDF

42.6 KB Created: 2021-06-03 07:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9d61261402ae19aa4e3491424e3a6067 SHA-1: ccbb12155155556deed333dd8de7a26450233638 SHA-256: f9ada0b7414de5bd0d0351662f7521911333dd60a0a323ec36504ceedbc1cf6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a "free generator / game hack". The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/free-coin-master-stuff-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-games_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E69 24512 bytes
SHA-256: 3a5b4fd47f3164e94a5198b27ef4f397f98966d7b5956506c10f0fdc76e6b62f
font_01_sfnt_off00008670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 17848 bytes
SHA-256: 4433ab11b9786de2c085a569790164fdba01b80ea586efee10f18c7ad04333c8

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