Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ea4b6aefdec6a2…

MALICIOUS

PDF

46.7 KB Created: 2021-05-12 17:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f1db986df6ba48ac2766ce10f43b1eaa SHA-1: 491e26f48b695ff3f220b99639f43c641e7fbdd8 SHA-256: 98ea4b6aefdec6a20249f407b9ff234daa95431a7f927065d4a12c3ef54a6afc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering "hacks" or "free Robux," which are common lures for phishing or malware distribution. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies a link to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coin-master-hack-apk-game-hack In PDF document text
    • https://de-licht.com/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CC 31756 bytes
SHA-256: f73677267440f6abe6047b00e812891dfa27a3d26c7d6269edd87607149e2528
font_01_sfnt_off00008b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000952d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952D 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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