Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee581b7e2860f8…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 14:49:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5905c820e6e7c822f678a76b2f2d8b5e SHA-1: 62b62f7ca49ba479a69a67410cc98da738c66101 SHA-256: 7fee581b7e2860f8d0b617ee9fc25857a38360caeb2567593a671c6b20a63da2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks". The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to further malicious content or exploit kits. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-facebook-game-hack In PDF document text
    • http://www.centralbarbershop.ru/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/cheating-hacks-for-coin-master_GM406889139.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_003_off00004a10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A10 24100 bytes
SHA-256: b566e880db3b79cd5f568b4ca96beac0311b3fcee0d9a2e80a9e0d90bb9ba4ca
font_01_sfnt_off0000807f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807F 18040 bytes
SHA-256: a8842bd0617fa86dd082827eea584dec3a7ee10a35fb1e5666a6d76cd5718c44

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