Malicious PDF — malware analysis report

Static analysis result for SHA-256 accb05f6bebf7812…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 03:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d12bafd8fb36558aa8155f747d94cf88 SHA-1: ea11d2d21e15edaf8af3cac8d6991aab30f1c176 SHA-256: accb05f6bebf7812f75926aac59f40767b0eadfda05ecd9cc24b095a48ef1a2c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://yafferge.ru/wix?keyword=aashto+roadside+design+guide+4th+edition+pdf+free+download In PDF document text
    • http://foguwefo.iblogger.org/how_to_clone_just_the_os_to_ssd.pdfIn PDF document text
    • http://mazafaka69pussy.online/fundido_meaning_spanishvbb2y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ff4c400a06bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/bamifawogexitos.pdfIn PDF document text
    • http://fifaraxilej.rf.gd/xoviwuzuvuwuxij.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/java_1._8_for_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/biodata_format_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/fotunuwizazizorepunileg.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/2375908451.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/angina_de_pecho_cuidados_de_enfermeria.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_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 5472 bytes
SHA-256: 2025b13b64f36445bc66e6049a5b6b658151331d91e3c4e75b8ca442bd404e2a
font_01_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 10000 bytes
SHA-256: df5dae506f52042a53102e24a49965429650956df70183af05dd10eb66278c2c