Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b369d5bb990376c…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 04:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 97045662502c2e1fe4271202d49235a0 SHA-1: 23bfc185bdd6f88aaa97790d4bb6636893d454aa SHA-256: 4b369d5bb990376c65387b5037192b8219548697e4d928d1db69c199e75c0b1e
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.tw/app/479516143/free-minecraft-hacks-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/helpcom-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-groups-that-give-you-free-robux-every-day_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/cheat-roblox-jailbreak-2021-tp_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-nike-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-galaxy-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/point-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/anti-speed-hack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-into-your-account-right-now_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-use-penis-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000305d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305D 22076 bytes
SHA-256: d93da586cf9585b84f3318d2aeaf311f3969bb6e3ccf42a7881739fa1d6652cc
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 18024 bytes
SHA-256: 8f8fda7ec61391a8021437fea0b23093d98da4680992c9daa6c8728c6d82e4f2

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