Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78640f2ed737714…

MALICIOUS

PDF

36.8 KB Created: 2021-06-27 20:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f92a4bc27f77a85c69dbe8b6676ac374 SHA-1: 561a16be5f330b3cdb07efb5598b0ef956dd81a8 SHA-256: f78640f2ed737714d49130d0f8637301974d6c6409950b6b5dc68601f8b306cc
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/codes-to-get-free-crowns-from-roblox-game-hack PDF link annotation
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification-need-no-password-needed_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/cheat-code-roblox-superhero-tycoon_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/gravity-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/roblox-remove-anti-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/roblox-free-exploit-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off000035aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35AA 23164 bytes
SHA-256: 6cdf8df5c73673865d8e4709fb80610f0a1ec8a57eea6f2fcd031dd0e2dfff6f
font_01_sfnt_off000069d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D4 19352 bytes
SHA-256: 7ca343030d1c62a42924e8f79e45987fef1a0dd92e9f8f420994745d7e75b117

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