Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99f30f3db6092a4…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 06:27:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 676378ff01d340cda77f936e1fa2b509 SHA-1: 948094ea070d9aef532183e345a13a5b5d2e71bb SHA-256: b99f30f3db6092a46c350c53b94c01aecc0657c9093d39d5a411351bacfc4713
220 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector, designed to lure users into downloading game hacks. The document body and heuristic firings indicate a pattern of linking to SEO-optimized PDF files hosted on a repository, likely to drive traffic to malicious sites. The primary IOC is the redirector URL, which serves as the initial entry point for the malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-wall-hacks-on-roblox-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-skywars-infinite-wins-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-human-verification-not-lieing_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/if-sombody-cheats-in-roblox-what-do-you-do_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-using-inspect-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/fre-shavacado-song-compilation-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/quel-touche-faire-pour-avoir-lz-free-code-dans-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-hack-topp_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_off00002eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECA 22168 bytes
SHA-256: e1598d5b3c1236a3e4ec8cda8e615cce93ef7a3dd2871b6c876582a3e67ded98
font_01_sfnt_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 19120 bytes
SHA-256: d49dbcbdd9079403246f82f1adcee7655eed850fdf857aafca80cb9be0eb1c2a

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