Malicious PDF — malware analysis report

Static analysis result for SHA-256 f417c01e6c1f1da8…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 18:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1fc842d8c93eff332c23afe817fae146 SHA-1: 45f1b862df250683dd81b1ffe79d55ccbf37a516 SHA-256: f417c01e6c1f1da803f461f8e3995dab7b73741a5db27defbd81cb69c64cf8a0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/479516143/free-minecraft-account-and-password-game-hack PDF link annotation
    • https://www.talakeel.com/uploaded_files/userfiles/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/pokemon-go-free-gift-box_GM1094591345.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/pokemon-go-free-7-day-research-reward_GM1094591345.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/what-tiktok-free-folowers-without-downloading-any-apps_GM835599320.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • https://www.talakeel.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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
stream_004_off000055dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55DC 25620 bytes
SHA-256: d3f7b6e98a14a53d93dcd3058395ad8ecf348d59f6d8f5037ba5e3b7b55af345
font_01_sfnt_off00008ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBF 18344 bytes
SHA-256: 071cc331fbe0dfc1a6c0e7c1f1383f87707aabc4deba919dc9b38235f2b9b975

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