Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fd7c9a0abc3d60…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 14:17:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9657150e6da3ffe2b1bde13fa020f077 SHA-1: 6fb1dd7b1d2229c09c5f6eb7c30b1055ee1a7aa1 SHA-256: 71fd7c9a0abc3d600d83d21a5e38a87a288bbd31f180c2eec62df0dbcb568f82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, specifically promoting 'game hacks' and 'generators'. The heuristic firings confirm these links point to malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggest an attempt to trick users into visiting malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/hacks-para-roblox-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-fame-free_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-cheats_GM406889139.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_004_off0000504b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504B 25448 bytes
SHA-256: a728724aafc8a7d5baa6bb3b5b52e0e8ffa03fa9497069bc8b3d2d9feea17156
font_01_sfnt_off00008b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7D 18336 bytes
SHA-256: 2c3591d0816fe2ec07885ff461cab1f1278707ef551a51e26631ad2b93349e2a

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