Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf72dd918d1a9335…

MALICIOUS

PDF

38.8 KB Created: 2021-06-26 00:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2c7f1c1c3a06d7e62395643e51fe33c0 SHA-1: 1507935432ae8be7782c039d7b45cfb8cefc449f SHA-256: cf72dd918d1a9335edfe3d3114be7bd061cc36f1328a59d756cff467662f3c3f
180 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, disguised as "free generator" or "game hack" content. The primary link directs to a known malicious redirector infrastructure, which in turn points to further PDF files hosted on an IP address. This suggests a phishing or malware distribution campaign, likely using a social engineering pretext to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.co/app/431946152/free-robux-in-5-seconds-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-app-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-catalog-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/el-mejor-hack-para-roblox-marzo-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-login_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-pour-roblox-apocalipse-rising_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-radio-games_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-bloxburgh-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-scripting-free-help_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacker-day-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-dinosaur-simulator-cheats-dna_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/stella-beta-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/easy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-tv_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
font_00_sfnt_off00004113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4113 22400 bytes
SHA-256: 4d342445d3b4a9ee187ffe40ef580005775312d2b3d9a28db797fc08d7eca13a
font_01_sfnt_off000072ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 19024 bytes
SHA-256: 32e885cda9f22d478afc316544d2df449eb2e753587968e7996ebff1e2e236eb

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