Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ae79bde4203a48…

MALICIOUS

PDF

76.2 KB Created: 2021-02-18 01:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6310af47f7ea761f7588956e9b8b6eea SHA-1: 2a497107608a43b1dc42d31813843beae2ccac21 SHA-256: 40ae79bde4203a48aeee36fe0a38ccc2c6d9936cea718884018867b27e1ba342
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=mares+puck+pro+user+manual PDF link annotation
    • https://cdn.sqhk.co/zidulibu/igevhaf/71675915648.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/1yjfj3L/71560215298.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/micGMhe/first_grade_math_word_problems_lesson_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/lAIjhif/tuwusezomimogoxilevop.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/hhbdjQg/93332801692.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/lasesetejet.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/hifibji/youtube_love_story_andy_williams.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/Mhfciih/makekene.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/ar5haCN/97059731365.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/jonora/67978668449.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/debajevetegujiwazimita.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/wikufebogisobepevapopumu.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/82005160074.pdfIn PDF document text
    • http://pikuvideposem.epizy.com/76147742876.pdfIn PDF document text
    • http://memaded.epizy.com/zevejuwazibutozanike.pdfIn PDF document text
    • http://likijanima.epizy.com/50548811644.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/vafawefatutepuru.pdfIn PDF document text
    • http://kazowaz.rf.gd/1932668218.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 5148 bytes
SHA-256: 8979e71b914ef747af4f8ef0fb06ad4b964c5d16ee095496e20127b6a44dd8bb
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 10904 bytes
SHA-256: db5e9d30b15994810e07b7c7104c0a5bfa30cb5e36cc9c71bcf82ab7bc45ad6b

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