Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35eea188b471726…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 18:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ea93792f707e23529137781a6cfb4d5 SHA-1: e9ac87c97b5a74f111cb57defaf54e2de1bc18f1 SHA-256: a35eea188b47172627e8504d3be3426a492c01ace4f2d9d9b4d8a7f1e3b17cdb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as game-related generators or hacks, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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/431946152/oprewards-com-roblox-game-hack PDF link annotation
    • http://www.access-coiffure-tours.fr/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-get-free-daily-spins-on-coin-master_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_off00004888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4888 25748 bytes
SHA-256: 564ad877f6fe345bc2040ebc7bb85589a9899752e920c5b427c6462c1e4ac53c
font_01_sfnt_off00008190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 18784 bytes
SHA-256: 639e9c6fee21fadec9bbcda4b83e838a121abbfeb61251c021aae19a2229de7e

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