Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc158f42d949107…

MALICIOUS

PDF

76.9 KB Created: 2021-02-23 14:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 34cbacab86fc81023caee463fd9b1eb3 SHA-1: 79024df6294fdc5f9b4f8065a52ad8483dac5417 SHA-256: 3bc158f42d949107c0a2e272aade3bd3e6147e0052f3fb9af9cde5831f1f3277
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=how+long+do+dyson+air+filters+last In PDF document text
    • http://ericksandoval.com/657951332992ivxj.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/dhfCrhh/gufexibixotutunijuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_5fe77bfcdebaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/cxipyij/wedding_hair_and_makeup_artist_melbourne.pdfIn PDF document text
    • http://baltika-trans.com/autodesk_revit_2020_contentskuzq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5fcbc863b2d84.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/nifMXpc/tiffany_solitaire_ring_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_602e2cf40bd61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_6017cd03c9bb4.pdfIn PDF document text
    • http://soldonlittleton.com/679830946596xy0c.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/pevarijidasalop/12993536219.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/8111216197.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/inflexible_yoga_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/66529896752.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/consonant_and_vowel_digraphs_worksheets.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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5228 bytes
SHA-256: 89662e8eab11614b937eaaf2e44b0b98b66465c6eea82d5de8e5f861779f9681
font_01_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 11004 bytes
SHA-256: 0352c71e38156c67eeaa8f66a1f451421297aaaf61705774dbe8119312b54967