Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcb0722637f238d…

MALICIOUS

PDF

41.5 KB Created: 2021-05-14 09:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e8d5d255e7081a30ddc49d7436b4f216 SHA-1: 9b21e32ee3e2a80eb522dee04b3a850c09439601 SHA-256: 3dcb0722637f238da90d5cc770531ec892dd4b243f9ab28ae6c2c45527c9e57b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "free generator / game hack" lures. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/431946152/free-robux-survey-game-hack In PDF document text
    • https://sdg-trade.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/free-coins_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://sdg-trade.com/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://sdg-trade.com/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://sdg-trade.com/images/roblox-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_off0000473a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x473A 24588 bytes
SHA-256: 0af8653a46be3cf53c775118d747084ea6df26cecdad0c19b306afb5f3b1e739
font_01_sfnt_off00007f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 18308 bytes
SHA-256: 74a940f1217583ab80956cd168fb81f959241543e2b3413e790743682303989f

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