Malicious PDF — malware analysis report

Static analysis result for SHA-256 060788b37786fa0f…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 04:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad5f821808d4aab1afcec1f2f684148f SHA-1: ab930d957298586e392b25dcf3553fef0f18bdf5 SHA-256: 060788b37786fa0f3bad3a458e84a3f61402b7cb8856a203a7c3e38d63c664cd
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 0.9971

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 https://netcdn.xyz/app/431946152/how-to-get-a-lot-of-robux-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coins-master_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
stream_003_off000046e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E2 26268 bytes
SHA-256: 52ffba7c3f37ea3c39a74489e201ba4e595d7ea994f6568cc1dacc4ac99ef7c0
font_01_sfnt_off000082c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 18120 bytes
SHA-256: 042a1857860dc696e0dbe9c9f325bf17f11d6ec89e659ed0d278e4175a2693af

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