Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f16c7a7a7f3b7f…

MALICIOUS

PDF

70.7 KB Created: 2021-02-08 23:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 618936f119119879e0ce9acf96bc0ff4 SHA-1: 034aff028626ce879074fece17871e91e4feb00a SHA-256: 67f16c7a7a7f3b7f68dd943b2502024843727eae519e3bca3ba5a4ab0a3c8247
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=salesforce%20meeting%20request%20email%20template In PDF document text
    • http://wapajojakazewi.iblogger.org/37012740597.pdfIn PDF document text
    • http://starkrobotics.org/tetegiaxso9.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/jaidfYP/12761059727.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/jeXJjdq/big_circle_color_contact_lenses.pdfIn PDF document text
    • http://ridunculus.com/52281683594n6t2s.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/ig0hfeU/top_english_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/hazXlgd/tofevixe.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/hhUkNqW/zajumotakazanawoxipuko.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/hfXkSjf/rail_rush_miniclip.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/tozaduliwubega/93740937103.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/sufanowojulozapeze.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/the_amityville_horror_1979_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/angular_formdata_c.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/71548008814.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/josowelurabesufun.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_off0000d419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD419 5564 bytes
SHA-256: 8f7dcfdde49a408dffbfa9b28b7d0461554c5e7415844769822a3553ba1dcddf
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 11428 bytes
SHA-256: 4c8f25841187e9192c322bf672f7cdabaa37a99d2d90ba3cd5597643b35a597b