Malicious PDF — malware analysis report

Static analysis result for SHA-256 6962aafef7fe623d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-15 17:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b072fd48bdcc3941fc1c28ef48a7c1af SHA-1: 0a8dd22b6ef0cd94f48222425c5f1b18e8ec9713 SHA-256: 6962aafef7fe623d0557f69b4f31a0c7d9f83bf74d60ba74ef6718401d1ef179
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a link farm, all disguised as "free generator" or "game hack" lures. The primary URL, https://netcdn.xyz/app/406889139/20-free-spins-coin-master-game-hack, is a critical finding. The document body also contains garbled text and references to the same lure, reinforcing the phishing attempt.

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/406889139/20-free-spins-coin-master-game-hack In PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-robux-gen_GM431946152.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_off00004c00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C00 25160 bytes
SHA-256: 692169e8f4852e387de47c39a7b4a938bab8405388a7476a3826e4c69e1d8b26
font_01_sfnt_off00008678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8678 18180 bytes
SHA-256: 322b0d5b629f6df55fd3c77851cbfe7ee71104dfe1b9214827344950ced1d0df

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