Malicious PDF — malware analysis report

Static analysis result for SHA-256 de76cca4c69485f2…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 13:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1b0277d0ee2f7fa3bc8b18245d7fd8d5 SHA-1: ae2af58dbe3376e4265d3dbcefd27a33c1695d45 SHA-256: de76cca4c69485f27324f2857eba9ffc9a3081ec6743793cae04e7a06bd8c422
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generators' or 'game hacks'. The document body and embedded URLs suggest a lure for potentially unwanted applications or further malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/free-spins-coin-master-app-ios-game-hack In PDF document text
    • https://ogm-goettingen.de/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-minecraft-java-edition-account_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D9 24460 bytes
SHA-256: 7dec45d1168ec71e116b7f62c18d5448913d771fb84c74fc0daa302ab891e4a7
font_01_sfnt_off000080eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 3440 bytes
SHA-256: 07d7dedeae459255b1281190e76adc4d0aecbd031be634f703e34f8a7ac19367
font_02_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 17884 bytes
SHA-256: baa69023d18af7e6e292b7ed0352255ac8c665d65dfdd35f206937513cc9840e

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