Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bdb43e65cc865e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 16:55:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9d720c2b1ed264aebc494f1e696baba6 SHA-1: 1394e84582550174664609713fe6c594a850bf5b SHA-256: a0bdb43e65cc865e81abb39692372751147eb506ef1eb43d319501ce8b862f3c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on a domain associated with malware distribution. The document body and extracted URLs suggest a lure for free in-game currency or items for games like Roblox and Coin Master, a common tactic for distributing malware. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains a large number of external links, indicating a link farm designed to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-army-robux-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/dax-she-cheated-roblox-id_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-inventory-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-vip-gamepass-free-script_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-group-with-funds-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/awesome-free-accesories-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-roblox-for-robux-for-free-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-groups-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-glames-with-gliders-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/descargar-roblox-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/using-cheat-engine-of-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-survey-or-human-verification_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3041 22648 bytes
SHA-256: 1d25d2a4241af25461de4e8ab990e59e9a9e051b9d50cb91f52db0ef9e02c867
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 19068 bytes
SHA-256: 46488008747678b96da064f9b256ae383cd27f899da2dd36c3cfbe9d9c1960b6

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