Malicious PDF — malware analysis report

Static analysis result for SHA-256 213b33ee2981a067…

MALICIOUS

PDF

47.1 KB Created: 2021-06-07 16:28:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dcd5e7b1a12197a2c7cfd45ea1fa58e3 SHA-1: dd472d808897d69ce65d4e8a3a709dbaa9afc423 SHA-256: 213b33ee2981a067820cf6bfcf24a712570cc10b548a514881f4a95355d84634
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and a link farm, designed to lure users into downloading further malicious content or visiting scam sites. The document body and heuristics indicate a focus on 'free generator' or 'game hack' lures, suggesting a phishing or scamming operation. No scripts were extracted, but the embedded links are the primary threat vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/2-robux-free-game-hack In PDF document text
    • http://italymania.ru/images/roblox-hack-unlimited-robux-download_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://italymania.ru/images/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/fast-ways-to-get-free-robux_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_004_off000051cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CB 30940 bytes
SHA-256: 8fbb2304d39561bc759ecf3ac1af4d697c8e4739921cf8c58778f5c93071e61b
font_01_sfnt_off0000965e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965E 18140 bytes
SHA-256: 676def2690161cea74b7e9675b3a3e65285c155402a386aff420f60992b5d97a

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