Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7bca64e1a70ce8…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 07:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a6201e5023b483c9c82a8f133d74fc56 SHA-1: 1f7220b6526a704d7c442f4d7c4003c58b3da795 SHA-256: fc7bca64e1a70ce801d0b89df403a2292dd604c6597831ca64c54c4afbcdc0f0
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 0.9980

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 http://netcdn.co/app/431946152/roblox-hack-scripts-pastebin-grap-knife-game-hack PDF link annotation
    • http://babbibooth.com/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-without-human-verification-on-ios_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/hacks-for-build-a-boat-for-treasure-roblox_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-no-human-verications_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-have-infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/www-bandicam-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-hack-pc-download_GM406889139.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_off00002cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0 22036 bytes
SHA-256: 0bc656c1a3cf9ffdd2ff26d06be07b01bd30ea789f28ca9b89ceb3bdc471ac05
font_01_sfnt_off00005d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 19212 bytes
SHA-256: 316e5cfa5e167ebef609c68f6b3014106bdcb50f3f340bf91f90ca3ebec15e0e

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