Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f70915c967c550…

MALICIOUS

PDF

69.1 KB Created: 2021-02-14 00:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 173783dde41957065945d2795db23391 SHA-1: f233306c0e7383559785eb7b7be131f49874839d SHA-256: 19f70915c967c550f10c159fa83972f050f1e76d3a03833949103ac2b4ba3bea
196 Risk Score

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://jottigo.ru/wix?keyword=what+type+of+poem+is+daffodils+by+william+wordsworth PDF link annotation
    • http://voicebftyi.com/carel_pgd1_user_interface_manualrvcyb.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/228dec239.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/7hhgjhd/86939146229.pdfIn PDF document text
    • http://bupetud.xyz/aop_glaucoma_nice_guidelinesk753n.pdfIn PDF document text
    • http://herss.space/mojagaxu4f2g5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moraruvotu.epizy.com/drawbacks_of_being_a_sports_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/economics_101_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/angular_material_formcontrol_disabled.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/81180407208.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/sasesirasixijoposokonotus.pdfIn PDF document text
    • http://jowuwivipi.rf.gd/marketing_strategy_types.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/20782484589.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 5628 bytes
SHA-256: 7721c259f98c01477f2367c953c267d61adb6532d13bd23b250f721d720d993b
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 10780 bytes
SHA-256: cf9463099486cae6ec563277cd040417c33bfd9c2b50ff816288acaf4219c1b3