Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7019ba837aac048…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 02:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e48aca74a47573d5d5cde219d2f52f87 SHA-1: f2e7e950d4948f75edc6bd61e5fb8ef81b57003d SHA-256: d7019ba837aac048cde267977fab816cec9ea9351340e11898890478621171cc
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 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-online-2021-game-hack PDF link annotation
    • http://tasleemdubai.com/userfiles/files/_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A7 24344 bytes
SHA-256: 6d44754761f24f2617969620bc673e50a2425d61cfc4b78dda16d0a8a4e6007e
font_01_sfnt_off0000806e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806E 18192 bytes
SHA-256: ec8cb6d56d0df2adcfe0c2b29b17454d13f1615f522836c6e7b582aab5d03dc6

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