Malicious PDF — malware analysis report

Static analysis result for SHA-256 052b5090893203da…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 23:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0a8f3134e8222181b14da1027ce0fa80 SHA-1: 6ca3e476f0d71f27c1fd7387ed5422c7b3073a82 SHA-256: 052b5090893203da732d9f4726dacb3068a49a4caac413fbbe94d5e2c45b2692
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or free item generators. The primary redirector URL, http://netcdn.co/app/431946152/good-free-clothes-on-roblox-game-hack, is flagged as malicious. The document also contains a large number of links to other PDFs hosted on digilib.stieama.ac.id, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the document's structure and embedded URLs indicate a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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.co/app/431946152/good-free-clothes-on-roblox-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-become-a-hacker-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/comment-avoir-des-robux-avec-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/lazyblox-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-promo-codes-march-21-2021-twitter_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/video-roblox-promocodes-for-free-wings_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-card-free-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/carding-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D4 22228 bytes
SHA-256: 82d3bee8206fd3333238181623cfbab83cc7e13480db3a50683952dd45a25f30
font_01_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 19092 bytes
SHA-256: 4f2377cb6b688446b31a52c6d544bebd5592b912cbd016f140bd1c07bda3344c

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