Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4db3db0dc9b5b8…

MALICIOUS

PDF

43.8 KB Created: 2021-05-14 05:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee2b1e981d1bf0b314923b35587c6ca5 SHA-1: 95aa8fdd505902c59344ab4ce5a8ddd0b90f1974 SHA-256: 0d4db3db0dc9b5b863c3b855b73f532be1e2a5ac08d9096ca362ef9a3e7cb955
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a known malicious redirector, disguised as offers for free game currency and hacks. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to a phishing page or a download of a second-stage payload. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/how-to-get-20210-robux-for-free-game-hack In PDF document text
    • http://plastic-surgery.pl/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/wurst-client-download_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
font_00_sfnt_off0000490b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490B 27408 bytes
SHA-256: b1f70c4c30aebbdd4081fd1a7caf83ea2a21635c6048ec6744ae1da2d20bbe8d
font_01_sfnt_off0000875c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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