Malicious PDF — malware analysis report

Static analysis result for SHA-256 118b53f7877d8875…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 13:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46aa779182db0eeb56f1d1c838c57746 SHA-1: 14ec3f8ca8cf9ccaef4df059ad126e5473d6fb0d SHA-256: 118b53f7877d8875ed897a4c50d2370a1147cc181628cfdc2f9699340d4420af
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/406889139/daily-free-spins-coin-master-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-for-free-no-password_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-credit-card-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-change-ur-username-on-roblox-free-nanoo_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-generator_GM431946152.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
stream_002_off000030cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CF 22508 bytes
SHA-256: 84cfcc84f390f9668347b180a218dade9d0e995b09db7bc79e50ae9b8035c523
font_01_sfnt_off000062f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 18596 bytes
SHA-256: e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2

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