Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02a539362ce3f10…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 11:50:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 804213362512c7167d16daad946d1bab SHA-1: 31dedd40ec50e746775fe9fe6770eb710b8b2ad0 SHA-256: c02a539362ce3f1078027ebb3d0e266350b3f6f97962f12e86db8f8b53b3b3c9
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO manipulation. The primary lure appears to be related to game hacks and free in-game currency for popular games like Coin Master and Roblox. The ML classifier strongly indicated maliciousness, and the presence of a 'free generator / game hack' redirector URL supports a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/150-free-spins-coin-master-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-glitches-and-cheats_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-download-for-computer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-any-tycoon-roblox-win10_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-coins-in-roblox-mm2_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-scams-no-verification-just-username-and-amount_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-2021-mobile_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/fre-robux-generetor_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-vehicle-simulator-how-to-get-free-cars_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-fly-in-roblox-without-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-hack-club_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-roblox-cards_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_002_off00002e69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E69 22548 bytes
SHA-256: 89a5ee6c8360a276cf84a6286cdac2ba5a9cffd195a844a0f286e1e212e7f67d
font_01_sfnt_off000060e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 18584 bytes
SHA-256: 76a6e98948f4582606d08be74898fe6bfdeb768e8671747b6a331dcb6ce47c1e

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