Malicious PDF — malware analysis report

Static analysis result for SHA-256 335c178b00ffa514…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 00:52:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e0f5f438b26e683b85d1a238aa10c9c1 SHA-1: dcfdd46db0fc0477c6128679fb0dea75d0a10cfc SHA-256: 335c178b00ffa514536b6f97152e2d16fe4256ac4cecf9ae56c0bc28d7ed6330
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and IP addresses, masquerading as game hacks and free items. The document body and embedded links indicate a lure to download further malicious content, likely to facilitate initial access via spearphishing. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/mcpe-master-hack-unlimited-coins-game-hack In PDF document text
    • http://183.91.70.7//repository/coin-master-free-cards_GM406889139.pdfPDF link annotation
    • http://183.91.70.7/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-coolkids-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3270 22972 bytes
SHA-256: 754ac8bf70bdd66cd08037f74b49b15260d180ac882d15ef196daf021ff0fcf1
font_01_sfnt_off000065cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 18876 bytes
SHA-256: 89932f8f13001460a6ffade74f2ab8dc0afa327f081132bd5821be57dc25f5e8

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