Malicious PDF — malware analysis report

Static analysis result for SHA-256 065c1af0783462ea…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 10:51:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d2aa3c44bcce07541deb8581f78ba93c SHA-1: 4860e6c4b7f13f196b302aef4ad0ececade6c449 SHA-256: 065c1af0783462ea37fb292756c43a14819aa9d6213bc1df281b2106178addfd
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-online-pc-game-hack PDF link annotation
    • http://www.ipsiagmarconi.it/images/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-coins_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-hack-someone-on-roblox_GM431946152.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_off0000486e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486E 23620 bytes
SHA-256: 3df9bd029b61a847314d575e89f22856f2c140c561361e5c8e9edc51c1cfbcbb
font_01_sfnt_off00007da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000922b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922B 17944 bytes
SHA-256: 99ef90df2ad25e1ee9ea34b8ec1afd309eb3ac7deee3ba27d18b4527052a99c2

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