Malicious PDF — malware analysis report

Static analysis result for SHA-256 36087dbb1d3e8df5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 18:55:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: be85f0e533b5b881a8c8d2a9d1f0c5f2 SHA-1: 8df55cd4352a14ddea999894a4bb3d58509d92e8 SHA-256: 36087dbb1d3e8df5f18d604b2c0483e9d110e75b8f489d01f3cad385dd86376e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks and free currency, designed to trick users into visiting these malicious sites. The presence of multiple PDF links suggests a link farm intended to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/coin-master-free-coins-and-spins-game-hack In PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-build-a-boat-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/good-outfits-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-place-view-bot-hack-forums_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/why-people-ask-for-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-hack-roblox-passwords-on-mobile_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-hacks-and-cheats-and-keygen_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-free-remdem-codes_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
stream_002_off0000319c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319C 23340 bytes
SHA-256: 573d993d28f1009bd90d958198141043b46b904dc96c641136248570ecea20c1
font_01_sfnt_off00006681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6681 18348 bytes
SHA-256: 8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8

Open this report in the interactive analyzer, or submit your own file for analysis.