Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4e4d44b99b5ce4…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 02:59:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cae14824bc22d4712a47b4748eeb1f58 SHA-1: 0979e73067d20155cbf89b18609b19f78c66723a SHA-256: 0f4e4d44b99b5ce4a08c9443cbc60c6a3fc1cd3b7e471896070709d7fac6e0d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising game hacks and free currency. The primary link, https://netcdn.tw/app/431946152/military-dave-roblox-free-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.tw/app/431946152/military-dave-roblox-free-robux-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-robux-no-verification_GM431946152.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_004_off00004e8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8E 27196 bytes
SHA-256: 1470a78b214ccc598f0cf743e7194c24bd70b26046983bfebf7943ccabd98aef
font_01_sfnt_off00008c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000964b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964B 19196 bytes
SHA-256: dbcd457a438225fb49e7a155fbb5d065d25112b510fdd937287eba84ef25d74d

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