Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fbcdc9a1a1fe8a…

MALICIOUS

PDF

41.6 KB Created: 2021-05-16 03:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 91591fe027679442615eef1db2e9fce1 SHA-1: 5048b0fc701cf520b15f9737cea34573e50188db SHA-256: c8fbcdc9a1a1fe8a3e7df9eed31dba5192f209b75705a337367d4863763c3fb8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are part of a link farm designed to attract users searching for game hacks and free in-game currency. The primary redirector URL, https://netcdn.xyz/app/406889139/coin-master-hack-apk-game-hack, is flagged as malicious. The document body and embedded links suggest a lure for users seeking cheats or exploits, which is a common tactic for distributing malware or leading to phishing sites.

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-apk-game-hack In PDF document text
    • http://professionalpilottraining.com.au/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/get-free-spins-in-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_off0000498d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498D 24896 bytes
SHA-256: 7d0d4b57e0e233c4b79d4c1934d63d64aad216d68d0c1069f365098f4282c638
font_01_sfnt_off00008120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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