Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfb7959cb5f0da1…

MALICIOUS

PDF

71.4 KB Created: 2021-02-21 09:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fd6c26273ea04b02a343794953271022 SHA-1: 631f450ffc85a662387e1805412d4b512eb9d2b0 SHA-256: 2bfb7959cb5f0da1049b4fe8250a0dfa7a6ee7a328e9128c0d4583300dce64d8
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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
  • 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://seumenha.ru/wix?keyword=briggs+stratton+prix PDF link annotation
    • https://fusavufotopos.weebly.com/uploads/1/3/4/6/134634064/bb5bc046d2dd0.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/Ts4gdhe/nufarirorizabe.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/5981640.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408177/normal_6008dba638c96.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/xakuwegapepepoboker.pdfIn PDF document text
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/telitifus.pdfIn PDF document text
    • https://zesujixiti.weebly.com/uploads/1/3/1/3/131398447/tirorik_kemonimubud.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/6891499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476273/normal_5ff4734337a67.pdfIn PDF document text
    • https://jamobosis.weebly.com/uploads/1/3/4/6/134684796/8b933b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_5fe7d7e580089.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/1643116.pdfIn PDF document text
    • https://telapawuwa.weebly.com/uploads/1/3/5/9/135964826/bomor.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/supapu_depivarupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/panasonic_pbx_telephone_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/angularjs_tutorial_point_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/easy_yoga_poses.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/pastors_housing_allowance_worksheet.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_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 5072 bytes
SHA-256: ef246bde5aebc5665dc367bb58861e1b7d7f1d06f400726f3e73cb62e93eeeac
font_01_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 10740 bytes
SHA-256: fd7a5d805de0dd6ac9511828e41a820b6bd87a519ecf58039303b1d07b2b15d6