Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa706c68e44f5da4…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 13:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f4fe340df40b23fc8b48fded84522094 SHA-1: 1fe82dee0dbc6e9fbbf3add19552835826b1aade SHA-256: fa706c68e44f5da40bbd2a988d3aaefe82b381b41a33b37e2bb77fe74b857d06
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as generators for in-game currency and verification services, a common lure for phishing and scam operations. The document body and heuristics indicate a focus on 'free Robux' and TikTok verification, directing users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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/roblox-how-to-get-free-robux-not-clicbait-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfPDF link annotation
    • 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-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-t-shirt-deacls-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/backpacking-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coins-coin-master_GM406889139.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/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-money-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-earn-free-robux_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_off000030c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C9 22620 bytes
SHA-256: 829436f9fbe8f0d81694845b756818eed401972c4619fe93ea7f2c749c751147
font_01_sfnt_off00006363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 19180 bytes
SHA-256: e5f5604bf779827ba4f5266976a032887a0b27ee6f469efab27112052f13e1c1

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