Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22ef00ba89749fb…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 16:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8973d60c4ce46db2e537feb6d4befb35 SHA-1: e09d4cdf38e24c7a14e1045241e87290e49b810d SHA-256: b22ef00ba89749fb71c94dff3a469f43221eb26b2f6e400c3af32e46685c1a62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with a primary link identified as leading to malicious redirector infrastructure. The document body and heuristics suggest a lure for 'game hacks' or 'free generators', aiming to trick users into visiting potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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/479516143/can-you-download-minecraft-for-free-game-hack In PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-free-shirt-codes_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-roblox-accounts-real_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-robux-hack-without-survey_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-no_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-unbanned-from-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/safe-cheat-ml-roblox_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/can-i-play-minecraft-for-free_GM479516143.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_off0000317a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317A 22028 bytes
SHA-256: acf2c62f17ce049bb31d6bb51cecf22c5eab349c6103790300315aee3b2a129b
font_01_sfnt_off00006204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 18880 bytes
SHA-256: d04a507d3641779a3965f5a6b6e6dd9ade08e797d0958b4441090374282c4c7c

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