Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cccf7c2f2bf274d…

MALICIOUS

PDF

46.3 KB Created: 2021-05-14 05:07:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0620242c5f8c80fc1b37b350df063d6a SHA-1: b0cb9a6cd97abb37db5ef1ba0ede6afbaf45be8d SHA-256: 3cccf7c2f2bf274d1983cf7c538250ca0e10269dc18d32d7663aa0889528f619
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that appear to be part of a link farm, with a primary redirector URL leading to 'game hack' content. This suggests a lure to drive traffic to potentially malicious sites, possibly for further exploitation or ad fraud. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/codes-how-to-get-free-robux-game-hack In PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A06 25852 bytes
SHA-256: a0c2c205363e17a95fb7c962cdc0159e4ef5a8b0a22058d15633bdaa195559e1
font_01_sfnt_off000084f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F3 3928 bytes
SHA-256: e74f895bd9277b0b0162feefce2cb4a319c55226065157fb04455274bdd0ba98
font_02_sfnt_off000091db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DB 18456 bytes
SHA-256: e7ed60d24a78ba6057de20e743a58d73d760a91b60c41324c250f3bd6f119d62

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