Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fa26a4d4b07861…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 09:08:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6003ba3bbf2a42f79a07e0ec8b41206b SHA-1: a6a55a4fdae270f2c69221fbec31edde9c8389cc SHA-256: 84fa26a4d4b07861d698f753e95c7ab7576feb63c9b7e3f2ec695c960ce75949
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that lure users with promises of game hacks and free items, specifically mentioning Roblox. These links redirect to a known malicious domain, indicating a phishing or scam attempt. The presence of multiple redirector links and a high ML classifier score further support the malicious nature of the document.

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/431946152/roblox-free-bundles-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id//repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_off00005187.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5187 25048 bytes
SHA-256: 4a6ccd2985a277bb4c831392c2507f371258c4def3425b4c9f0cdfab4af4c611
font_01_sfnt_off00008b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 3032 bytes
SHA-256: 7f5e5e86f6cd8e0bd44e0fbd77dfcb2388636424372adc9ef51f57cb5656eb2b
font_02_sfnt_off000095d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D7 18260 bytes
SHA-256: ed73f26fe39a6ceec3b8cb9f78cb2769c99c91aa7d74f7e016d55c21fe231794

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