Malicious PDF — malware analysis report

Static analysis result for SHA-256 e737c79a23eeac64…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 21:35:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dee0e39bbe315f97088bfc0e1e2567a8 SHA-1: 77008497b04f4e850ccbfddceca4011cdeaa05d5 SHA-256: e737c79a23eeac645deb5e2e5abcaea72578840238ea545449557a13772c67f3
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://soxebez.ru/123?utm_term=vans+old+skool+color-block+skate+shoe+-+blue+%252F+green+%252F+yellow PDF link annotation
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/6390593.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/juxetezu.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/pogodabex.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/222138.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/5b39f513a6b.pdfIn PDF document text
    • https://xalidanazate.weebly.com/uploads/1/3/6/0/136082238/d728d1401ceea16.pdfIn PDF document text
    • https://jutarufuro.weebly.com/uploads/1/3/0/7/130775772/892152a978a.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/9884584.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/7478861.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/xeruxaxer/mojobosoku.pdfIn PDF document text
    • http://fobumiwaw.epizy.com/g_letter_images_in_heart.pdfIn PDF document text
    • http://sajonagot.rf.gd/20209373365.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/harry_potter_y_la_orden_del_fenix_audiolibro_parte_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/pavulixupoviritumodeki.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/10991427174.pdfIn PDF document text
    • http://ladorum.epizy.com/36477658241.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/kesukiwewusuvavas.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/guide_du_routard_paris_2018.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_off0000dddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 5632 bytes
SHA-256: 139cca472d697284382cfdbba5cfd3185d34af40625fa2ec81faa373c4ea83ef
font_01_sfnt_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 11400 bytes
SHA-256: cbd02d36fed355dd19823f755887644fd6ff061d34a9c284e5b2d3e36f927735

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