Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b338b97dd32f69…

MALICIOUS

PDF

48.3 KB Created: 2021-05-16 03:14:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 31bd97634a1c638f5bba9415bfe465f3 SHA-1: 1acd10ca9fdb7b8e61fd2c9ea66fe37029aecc5d SHA-256: 80b338b97dd32f69b96ce0dd44de593ba7b293a74f62c5edfea9205527a9819a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, as indicated by the "PDF_GAME_HACK_REDIRECT_LURE" heuristic. It contains multiple embedded links that redirect to potentially malicious infrastructure, specifically the URL https://netcdn.xyz/app/431946152/oprewards-robux-game-hack. The document's structure and embedded links suggest an attempt to trick users into visiting these sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/431946152/oprewards-robux-game-hack In PDF document text
    • http://www.backlineservice.nl/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-get-free-robux-website_GM431946152.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 25004 bytes
SHA-256: 46afb7050d74a45b7d5da45452f3c50c46895fe21bcfb4119262f35e33443fe8
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3A 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off000098e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E2 18592 bytes
SHA-256: 7d6f50a950363cb67ce8ae8db88bc038f2e04ece5b1cd119157d21c4c1c9bd15

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