Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1cf0a58c198772…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 07:06:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6649803a515ec289a0374e2a5cb31ea0 SHA-1: c84c40d4e9ee4e158114bf1ddba3813edf0ad175 SHA-256: 9d1cf0a58c1987722f5bd596fd8c8890c77382c4feaf71811546a311ba8e0e82
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to lure users into clicking on potentially malicious content, such as free Robux generators or game hacks. The document body and heuristics indicate a redirection to known malicious infrastructure and a link farm, suggesting a phishing or scamming attempt. No scripts were extracted, but the embedded URLs and link farm structure are strong indicators of malicious intent.

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/oprewards-com-earn-free-robux-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-on-roblox-build-a-boat-for-treasure_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-on-mac-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pokemon-go-free-clothes_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-how-to-increase-speed-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/tiktok-free-view-iphone-wallpaper_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-apk-hack-unlimited-robux-ultima-version_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-phantom-forces-hack-lua-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hero-havoc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-no-survey-no-offers_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 22636 bytes
SHA-256: 0b37091e6628b4c452bf6220ce804bcf12f0028560dba0a11f450bd02014f2bb
font_01_sfnt_off0000631e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 19492 bytes
SHA-256: 159b92b08bcbd5589de2501c601f7d2f84a16c9e1f81bebac8ee54eab686b9d5

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