Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de3432b84ef1360…

MALICIOUS

PDF

45.2 KB Created: 2021-06-14 00:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e1f9406b025c8decd215a6a808b1c775 SHA-1: ef30424ed5243765d2bf23734e037dd6c671a292 SHA-256: 3de3432b84ef13606ad97e68a6d1507e74761554dd48a8249c93b164cbaeeccd
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file 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 0.9551

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.co/app/431946152/1k-robux-free-game-hack PDF link annotation
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-roblox-dont-need-any-robux_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-november_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-legal_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/oprewards-login_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB0 25864 bytes
SHA-256: cdec4f8d9133a89f877c2224524ade50277a71431bde1af0633b0c173925000e
font_01_sfnt_off000084ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AD 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 18288 bytes
SHA-256: 454670ef39d20d2fe0ba3a5264de6f85de00fe219085ffdb8a0782d2475cca31

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