Malicious PDF — malware analysis report

Static analysis result for SHA-256 edccf401a623df16…

MALICIOUS

PDF

20.6 KB Created: 2021-07-04 14:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 88c4908a66047aaaed69bb13697d3ed0 SHA-1: 75baf15a25f7938488c665624be0794c17e46a3e SHA-256: edccf401a623df16eb98e9122c820107a74853f054718fb14ad75afb175ad1ed
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'free generator' and 'game hack' lures. The primary URL, http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 3

  • 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.
  • 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 http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-xbox-1-cheats_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-ticket-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/take-me-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-a-free-dominus-in-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/mcpe-hacks_GM479516143.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E19 15259 bytes
SHA-256: 0e24e1d44a4febcc69051dcab840462e2aeb9c2ddc113d7a88f0afba655ed741

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