Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fe3e4276b96aa7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 08:26:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9add5a19441383ace167bab41c6cf0e4 SHA-1: 09b1d29f2fee91e0acae52485eb981617644f9de SHA-256: 72fe3e4276b96aa76b5e0c25ff0a892d61985da1bbbc67a18b2120407de86a78
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9980

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.co/app/431946152/how-to-get-hack-on-arsenal-roblox-game-hack PDF link annotation
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-code-hack_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/hacks-for-the-mad-games-roblox_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/can-i-make-a-costum-charecter-is-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/22-500-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-roblox-2021-rich-accounts-logins_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-free-coins-in-skywars-roblox_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/roblox-hacks-for-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-free-spins-on-coin-master-2021_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
font_00_sfnt_off00002e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9C 22928 bytes
SHA-256: 94d81821e94132920127dc6f4aaa93d82b23f6e9dbb89d614d4851c16d531776
font_01_sfnt_off00006254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 18924 bytes
SHA-256: 32a64c087fea6d9bac05ed25f6913e8a405c2d450d1ded017854af1a77348c57

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