Malicious PDF — malware analysis report

Static analysis result for SHA-256 760ee3fcf819e695…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 12:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b29de94f04546fcf7da04d8f062da08e SHA-1: 5406ed2f073fa504e4e108c485456926cde370c8 SHA-256: 760ee3fcf819e6955995fa5a35c92bfa3364460fa217bc98fe5646c33f582edf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The document body, though partially corrupted, suggests a lure related to 'hacking' or 'free items', aligning with common phishing or SEO spam tactics. The ML classifier also strongly indicated maliciousness, supporting the assessment that this PDF is designed to redirect users to potentially harmful content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • http://linde-erbach.de/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-on-ipad_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_off00004b57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B57 24860 bytes
SHA-256: 61882d3134b5ef325bd3aae6a0c2abeed5350e3841140034430837d6e37ccbac
font_01_sfnt_off000083f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E04 18196 bytes
SHA-256: d34ad1dbd9dd4a0600043f837e3a6c6fdafb13b781254d1b565cb7d4b46c75dd

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