Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b7cd3011eb0558…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 04:08:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 144e6e117b78f4c296d60730ace47d1b SHA-1: 2847b01315eada8cebf872dbc9ce7cd687fd5a88 SHA-256: 80b7cd3011eb0558d0014a2980134b5ddb00302163f962314eea10754ef21078
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are part of a link farm designed to attract users with promises of free game currency and hacks. One primary URL, http://netcdn.co/app/431946152/how-do-you-get-free-robux-and-tix-game-hack, is identified as a malicious redirector. The document's content and structure strongly suggest a phishing or scam attempt to lure users to malicious sites.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/how-do-you-get-free-robux-and-tix-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-connect-to-xo-s-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/are-tiktok-free-views-without-verification_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-robux-hack-with-required-password_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-bunny-ears-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-do-i-hack-a-roblox-user_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-roblox-gift-cards-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-100-spin-link_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAE 22760 bytes
SHA-256: 4df986fbf0558c40072118c57be6f055b250a0503c640d9b932396105ec6aa12
font_01_sfnt_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 19608 bytes
SHA-256: dd83d3897efa29a74baf2a512b8c4691548d4f8a6837925fc4a30f93af83f575

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