Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30b559fde834057…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 03:37:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fa40fa48128d2975d5be3fba1faeebe9 SHA-1: 17a3aacc90ab523d1d41132baa7a767eff99f7c4 SHA-256: b30b559fde834057ed5e64271439e6526d18c76e46187ede7102e166ccb12f2f
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 0.9971

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/406889139/coin-master-hack-software-game-hack PDF link annotation
    • https://adventureglaciertreks.com/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.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_003_off000049f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F1 24048 bytes
SHA-256: 00d7e127babe453a3b69b0599b61679c345b29e05e96a6e72fff8382d0c26bd2
font_01_sfnt_off00007fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB1 17880 bytes
SHA-256: 544f43ea8445c04f90b32bb89fa74997ce853b2370fee25cb972ddebb18b4158

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