Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db79530b462654d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 11:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f4063302b56e7af04a3ab1f640533073 SHA-1: d43adf6ec2343e4d3280548b4d7dd1447513b71a SHA-256: 0db79530b462654d2006e28e1b98c3b4fa322416adcd58be5615d5a1cce76baf
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/roblox-mobile-hack-game-hack PDF link annotation
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-glitch-may-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-roblox-accounts-generator-with-robux_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/como-recuperar-mi-cuenta-hackeada-de-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-unused-roblox-redeem-cards_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-cheats-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-free-robux-on-a-ipad_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/hacking-in-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-use-penis-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-car-free_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-bc-generator-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-free-vip-in-miner-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-gift-card-uk-free_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-hack-free-skins_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-how-to-get-free-obc-lifetime-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/www-robux-hack_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/box-prizes-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-sprinting-simulator-cheats_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
font_00_sfnt_off000030e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E4 22160 bytes
SHA-256: 1dd6a041786d140fbb53f19f62223fee3a5e1c575e24249aa15cfd96f8b81552
font_01_sfnt_off000061e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 18972 bytes
SHA-256: 0e9155019685f09988e5274749080987783afe0cd242ca2fcc27e9f8310fa0e4

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