Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a0ba53f710f6ae…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 19:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 674e0c395efa472d30e12ebce49e20fe SHA-1: c30bbd3e15d8711b942990ecf2cfde5ac8cd589c SHA-256: 46a0ba53f710f6ae920577b995013e68024c77cfd7354def32a8e106580a05e3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of 'Free Robux' and game hacks to entice users. It contains a link farm directing users to numerous other PDF documents hosted on `perpus.polbitrada.ac.id`, which likely serve as further lures or redirects. The primary malicious URL identified is `http://netcdn.tw/app/431946152/free-robux-with-no-verification-2021-game-hack`. No scripts were extracted, but the PDF structure and linked content indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/free-robux-with-no-verification-2021-game-hack PDF link annotation
    • http://perpus.polbitrada.ac.id/repository/how-to-get-robux-for-free-insetently_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/pokemon-go-free-gifts_GM1094591345.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-noot-noot-hack-song-roblox-id_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-badges-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-wikipedia-free-encyclopedia_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-hack-generator-no-survery-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-free-lvl-6-exploit_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/deleting-baseplate-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-anything-you-want-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-stuff-on-roblox-catalog-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-free-swords_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-hack-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-in-roblox-2021_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_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 22076 bytes
SHA-256: 51dfe20f2661fae8b2aca00b2093665765c5ee62742dee6c013786ba7676e0fc
font_01_sfnt_off0000600e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600E 19840 bytes
SHA-256: bf7c23b41782422fa131bc9f6708f01af46f806364d2ae517c2179326a085b42

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