Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b33458a015a86f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 04:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ed504f559f0e83f7cd1339653ce8f871 SHA-1: c8bfe38043eafaf5fd07f86ea03f09bf093be3d9 SHA-256: 02b33458a015a86f6eb3f140d2f366a61ac4d2ff8debb8446f03ed4d55b3e126
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-free-spin-link-twitter-game-hack. This lure, disguised as a game hack, is designed to trick users into navigating to potentially harmful sites. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/406889139/coin-master-free-spin-link-twitter-game-hack In PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-promo-codes-february-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-andoid-robux-hac_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/pubg-uc-20_GM1330123889.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-clothes-roblox-no-hack_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-hacke-auf-spaghetti_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-roblox-invitation-template_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-money-cheat-codes-xbox-one_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-be-invisible-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-free-candy-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off000031b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B2 23484 bytes
SHA-256: 3ee1f4b85d111d3d154801d377f1c260675233dce58e8c99f758872de86d2d8c
font_01_sfnt_off000066e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 18508 bytes
SHA-256: 52484591f619487d449f69eeb4555e60548c3b5caed5593e23e35b0a83680989

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