Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ab0993f0f6b9a5…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 00:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a80265e561ba2a2a9d445b2caf534748 SHA-1: 3a68a03cfae29a4420165164ae1207176eba7c2e SHA-256: a2ab0993f0f6b9a56e047dc65ebaf175c86ba8e117d29ec8f71cd6a1f2da904b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, masquerading as game hack tools and free currency generators. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to external sites via deceptive content, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-hack-tool-v1-9-download-free-pc-game-hack In PDF document text
    • http://mostowicz.pl/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/is-it-possible-to-get-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004767.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4767 24816 bytes
SHA-256: c3496441cbf06f1fa96a0dcf8b65424872670b8b16857ccfa5af2ac23db630ad
font_01_sfnt_off00008064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8064 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 19016 bytes
SHA-256: 72463d413271541d222c1197f8f9a8edc1a249d3ebb9d07bd42a16f0c907e414

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