Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a339a77e3c78d64…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 22:59:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 18fd01e82dd95a08da0868df711f1730 SHA-1: f468288af31d593622ebf8d9a5cfbd5341ab6bac SHA-256: 1a339a77e3c78d6474ce6dde4e1caf342e003931ab00ff570acea95b6f588ce0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as game hacks. The primary link, https://netcdn.online/app/406889139/coin-master-free-fire-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/coin-master-free-fire-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/pc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/websites-that-give-free-robux_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_off00005177.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5177 24616 bytes
SHA-256: a68aab0c3cdf82b7d37737cb9a50fadbcb732ec039d721418f556afecf85c5f0
font_01_sfnt_off00008985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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