Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de3cebcd44d6d56…

MALICIOUS

PDF

45.4 KB Created: 2021-05-15 23:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9181ea7b79543f03fa99794b06cb6a4e SHA-1: 2425d8394b8a2787c151a4c69167d0eac3be57f7 SHA-256: 4de3cebcd44d6d5658f7a6b4e08048d824dcc4b5fa9952e294599a5287b09a3c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9507

Heuristics 4

  • 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.xyz/app/431946152/how-to-get-free-robux-easy-game-hack PDF link annotation
    • https://ogm-goettingen.de/images/spin-link_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/link-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/rbx-sites_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000485c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485C 25812 bytes
SHA-256: 4aee7dabf4458aa6f59eb2a8c5ad84a75ebc7ad697b8e8d992518684d6cf6db1
font_01_sfnt_off0000837d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837D 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D67 18688 bytes
SHA-256: afa93f6b5b78c11c56913a3e0021d293f85f1b4278f41e2b8713ad9a89f051de

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