Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edae58f26b5068a…

MALICIOUS

PDF

37.2 KB Created: 2021-06-17 21:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fb524970c3d68d9f3736b0caa35ddc6f SHA-1: 128ac099dd0030490916c62e0b1e490f8b808b70 SHA-256: 3edae58f26b5068af4d972f484e3d0847f75305281c96a5355ba08cc96d3c8b9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appear to be game-related generators or hacks. These links lead to known malicious redirectors and a large number of SEO-optimized PDF links, indicating a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/free-roblox-card-codes-2021-no-survey-no-download-game-hack In PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/porque-no-injecta-el-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/robux-hack-in-1-minute_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-site_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/jailbreak-roblox-free-money-glitch_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_off0000376f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x376F 22640 bytes
SHA-256: 378919b763c5a903407ac41bb4a01a28048d73b8796ef8d325beeb19d6dcd808
font_01_sfnt_off00006a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 19808 bytes
SHA-256: fc1fde105cbfb24a93b13291e12fa1cd75d08a9f6bca8981c3bb32a363a809d9

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