Malicious PDF — malware analysis report

Static analysis result for SHA-256 665603a490c4bd37…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 02:21:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 463f6464e24e176c2a09b36362721cff SHA-1: 54dca1f975d899860bfaedd790f80007b50443b2 SHA-256: 665603a490c4bd3791620229a0b4c4ab3bb3a65fbf1fcbaf5f9d9690836206ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary link directs to 'netcdn.xyz', which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful websites.

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/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.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_003_off00004b44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B44 23940 bytes
SHA-256: e720a8f761b1aaf1a711a6436ccda4d84b70835ef7f22ffbc24f551bc8911052
font_01_sfnt_off0000821d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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