Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7c877d93554243…

MALICIOUS

PDF

72.5 KB Created: 2021-03-24 03:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7fd9c808a32bf3dccea9424df9528836 SHA-1: c6474012be776305c5c8ae1bc77d912fe714e005 SHA-256: 6f7c877d93554243651df9a7f6e2a4aa00612e304ef89cc38b0a6c37de6b9817
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of a link farm or redirect to SEO-optimized content, indicating a malicious intent to deceive users. The primary lure, 'gardenscapes hack online without human verification,' suggests a phishing or scam attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/wix?keyword=gardenscapes+hack+online+without+human+verification PDF link annotation
    • http://zigejetulanoda.iblogger.org/omo_see_aunty_wey_mumu.pdfIn PDF document text
    • http://dubiniba.iblogger.org/10874948299.pdfIn PDF document text
    • http://hookup671.site/99036833454yua2b.pdfIn PDF document text
    • http://walkover.me/karcher_pressure_washer_pump_oil_levelnrm5g.pdfIn PDF document text
    • http://mebel-albero.ru/scanner_app_for_windows_10qdb73.pdfIn PDF document text
    • http://demask.space/nusodotujrhzwg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kukupunopedon/wurerorosagixevezusu.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/55840799175.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_f807ec1823ad46a29e361c58d8eb8bd5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/17986601333.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_90db78bdde464176a7d0a090b31e7038.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/natuduzegojobefovojo.pdfIn PDF document text
    • http://wakurenup.epizy.com/35883151710.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/world_competitiveness_report_ranking.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cisco_switch_sg350x_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/fire_reports_near_me_today.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/kobe_earthquake_news_report.pdfIn PDF document text
    • http://numekup.epizy.com/abominable_full_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/99661336534.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_b98d65d6d3df43f38da27ede9fa2725d.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06C 5524 bytes
SHA-256: 9c4adcdd427707e8edd0650ad6bacba54437df3d711e1775bbd95ffd29f6345f
font_01_sfnt_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 10172 bytes
SHA-256: 9dffe29c39ba8ace3d2958d72610cab56c213f75b61fb4652ed3cbec8477cef5
font_02_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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