Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff60131c9a20393…

MALICIOUS

PDF

40.8 KB Created: 2021-05-16 09:37:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c5045eef4326d46db9ad38639f5361bc SHA-1: e141a6b10332069ecf956e5fce2a1ff765bf4f28 SHA-256: 7ff60131c9a20393daf5a30baf22e33e2b860d3f02c9b8ca5375fe4f94e1678f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free game items or hacks. One critical heuristic identified a link to known malicious redirector infrastructure at `https://netcdn.xyz/app/406889139/freecoins-game-hack`. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt to redirect users to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/freecoins-game-hack In PDF document text
    • http://umksn.pl/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://umksn.pl/images/level-coin_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/minecraft-gun-mod-download-free_GM479516143.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
font_00_sfnt_off0000479e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479E 24632 bytes
SHA-256: 1a052f54cb921ffe4aae25b358f215297c18225c536bb4086b2b0d54b43ab09f
font_01_sfnt_off00008009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8009 17380 bytes
SHA-256: b7451c9dd0ac59d2b5cb55b76db2f7cf076c87adc9efeb70e2d733c8c551e0a5

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