Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2d545821dd3907…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 19:45:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1eeee7dfb3e05639a0313ba341f3cc67 SHA-1: dd369e696e8176ee3af53e7e631c551f7a4461ca SHA-256: ad2d545821dd3907830e45e1967ba68993c434f3a6a56594234a866e8007b979
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and IP addresses, all masquerading as game hack generators. The document body text explicitly mentions 'How To Hack Robux' and includes URLs that lead to further PDF files hosted on an IP address, suggesting a chain of malicious redirects designed to deliver a payload or phish users. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to exploit user interest in game cheats.

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.
  • 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.tw/app/431946152/how-to-hack-robux-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/the-laughing-unicorn-free-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-construction-simulator-script-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/no-censor-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/xydia-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-lumber-tycoon-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-project-pokemon-exp-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/jailbreak-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-into-vortexxonyt-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux-without-human-varifacation_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-hack-download-mobile_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-hair-for-boy-roblox_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_off000032e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E1 22744 bytes
SHA-256: f2386572497a87d7d6273af9c65499f37f1dfe39027458b166a55b41cec36e58
font_01_sfnt_off00006578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 18884 bytes
SHA-256: eabb09a914750731f64ad11a0b688188fe1798403d7ade495959fd69a4976413

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