Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c24fd82e7842fc…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 13:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9f596a25a10fea318f9e30d3e9a0de8a SHA-1: f78d84380f37e60bf9e7dd15f2c04a0e06fdb77c SHA-256: 26c24fd82e7842fca8748767587bd2c9ff3b806cf9382216ef8ce318135baebe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "free generators" and "game hacks". The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering lure to drive traffic to potentially malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-spins-for-coin-master-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-java-account-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F2 26128 bytes
SHA-256: b768d41eaa12d6cf214a3616b6c2ad8185fdbd8f02cb849350ddbfc6e9aaaa52
font_01_sfnt_off00008d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D02 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000096ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EC 17884 bytes
SHA-256: 7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc

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