Malicious PDF — malware analysis report

Static analysis result for SHA-256 6234c30536ba5107…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 17:18:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 15420d50e9533d75cc1bc4c236443c76 SHA-1: 6a381c6f051f9da5997cb9cb3efe681e56df30b6 SHA-256: 6234c30536ba510760c4f6c3de58a377f9bb956e06128d3a24e0259e4f0a185a
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link redirects to known malicious infrastructure, suggesting a phishing or scam attempt. The document body and embedded links are consistent with a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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.tw/app/431946152/how-to-get-free-robux-without-human-verification-2021-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-a-lua-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/admin-roblox-pastebin-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-robux-generator-parts-pokemon-silver_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-rewards-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_off000031a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A2 22660 bytes
SHA-256: 874e53b7ee758adea3df2e0b73fdaa633d43074ef5d406277e0ce430dfa88a22
font_01_sfnt_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 20264 bytes
SHA-256: 26aa4917e1153719256d6dd4d07c71b39b84df2f774e0169f128f53eab8dbbb8

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