Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd5335158a61681…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 03:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f4db3d8adc3adedd5c9dfdde4db3d710 SHA-1: d0136dada6f3b7c012394a8f315a4d5214c21cba SHA-256: edd5335158a61681c8d024ec8d6a436ef2707bb087d45a51bccdea4721e3e9a5
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 "free generator" or "game hack" related content, which redirects to malicious infrastructure. The document body, though partially corrupted, contains a URL pointing to a known malicious redirector. The presence of numerous SEO-optimized PDF links further indicates a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/how-get-free-hair-on-roblox-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/gratuit-et-sans-code-hack-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someone-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-skin-on-strucid-in-roblox-how-to-get-i_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.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
stream_004_off000050d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D7 28708 bytes
SHA-256: 18dfde27fb2837566cb6bce56df9903315cf0db037b7278f62d8d09cc9dd35c9
font_01_sfnt_off00008f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F38 18564 bytes
SHA-256: 77504c534728f17aa1ded69a4ea2cfefc9c67e3468f541c4a2a873fcdd2d5c02

Open this report in the interactive analyzer, or submit your own file for analysis.