Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e709b1702af997…

MALICIOUS

PDF

67.5 KB Created: 2021-02-20 15:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a452c73289efc57ae07008796977510b SHA-1: 43f7e9ab9557112b353fc98ea6ccfa9d6c149cf8 SHA-256: 41e709b1702af9975b9731388fb407d7158d1653906a0d5bc0777f3fdaaca9bb
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://bologen.ru/wb?keyword=when%20we%20were%20young%20lost%20kings%20lyrics%20deutsch PDF link annotation
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/faxebijukij-donavezumad-wabujes-kazanake.pdfIn PDF document text
    • http://form-copyrightservices.com/iec_standard_drawing_symbolseipx0.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/kogetidanumalejobori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_60297cbe7604f.pdfIn PDF document text
    • http://ridatamararib.22web.org/xfinity_xr2_remote_code_for_samsung_soundbar.pdfIn PDF document text
    • http://activa-fb.com/sesesibepopumuvifikugajeztp2g.pdfIn PDF document text
    • https://netajetuz.weebly.com/uploads/1/3/4/6/134651380/cbccad.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/zomuzigo/delerabibavenonun.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/articulate_adj_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/budogenevumagotitebesiruk.pdfIn PDF document text
    • http://fujebaxe.epizy.com/bike_frame_design.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/taguke.pdfIn PDF document text
    • http://madanekobovuge.epizy.com/nubepozepakukedizenup.pdfIn PDF document text
    • http://pogifovemujure.epizy.com/standard_business_letter_format_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/gamibemefivo.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_off0000cd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD86 5264 bytes
SHA-256: 7c359fa42bba0560feaf3cf9c0039b286147061849efc36a432cece6cd72fcb1
font_01_sfnt_off0000df8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8E 9832 bytes
SHA-256: b8ab78f5566a95afc2d032fe5cc8332eaf173274855fa64a74ad03157fddb514