Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59af7a731d67781…

MALICIOUS

PDF

71.1 KB Created: 2021-02-16 05:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 63f853c4e8a431a793ea233f280cd3e1 SHA-1: 70b42aa263c8ad254da128368dcad477d0bbcf3b SHA-256: a59af7a731d6778163140674ec5def8c7a095c1e40cd3a8ff9934cd098342d76
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=sc+social+studies+pacing+guide In PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/vosilebo.pdfIn PDF document text
    • http://afracheat8.xyz/delasikijaraxetweax.pdfIn PDF document text
    • http://eeeeeyyy.space/58155931285x7ad7.pdfIn PDF document text
    • http://de-bewertung-889562.icu/death_point_mod_apk_android_1s0xid.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/3feb2f3f55.pdfIn PDF document text
    • https://disemiseses.weebly.com/uploads/1/3/1/4/131407045/3856912.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/4032355.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/piwanisaj/xepepubevurixozawif.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/oecd_beps_report_action_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/noneguxixar.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/card_animal_4d.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/free_printable_color_orange_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/werijutafavi.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/basic_electronics_repair_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/57713488677.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/wexapegurofobivorubufuxup.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/guided_reading_comprehension_questions_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/51837143967.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_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 5248 bytes
SHA-256: e6219425cb422614076237c8250fd935fa2f4b9f746f47c59fa3a613ab68dc8d
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 10468 bytes
SHA-256: 082e5b4a5ef67d717f5043221ff7cd016017b2ea24bdb3c674b36e2e13525852

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