Malicious PDF — malware analysis report

Static analysis result for SHA-256 4268a08016d69cf9…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 22:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb362da9a84fd71726cd251fac2ecf48 SHA-1: 8ebbe1609c5f16aa9feb99256f74c34adb9deec8 SHA-256: 4268a08016d69cf909da39fc780ee88f4fefb79619f493d297512d71b0397bd4
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://crophysi.ru/aws?utm_term=what+is+the+best+way+to+start+buying+stocks In PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/dd8b20418195c.pdfIn PDF document text
    • https://majuxakitififez.weebly.com/uploads/1/3/0/7/130738909/3552471.pdfIn PDF document text
    • https://didowaxa.weebly.com/uploads/1/3/4/3/134387091/a242830f0765e36.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/4709125.pdfIn PDF document text
    • http://tuzimolij.22web.org/bearcat_880_tuning.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/wovawekibufa.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/niporofez/prisma_systematic_review_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/durable_functions_orchestration_template_missing.pdfIn PDF document text
    • http://bojefej.epizy.com/pinimexoru.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/erba_chem_7_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/tanoke.pdfIn PDF document text
    • http://jojisoxig.epizy.com/kathy_mattea_sheet_music.pdfIn PDF document text
    • http://temekem.epizy.com/zokotekolatagazu.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/50453912170.pdfIn PDF document text
    • http://ginokiximoz.rf.gd/dowavumubinepebuwefe.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5440 bytes
SHA-256: 1b1dd1616f2b190886c094a25d20e63e1da27afcdb7b2f6b3cb52ac221013cb8
font_01_sfnt_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 10196 bytes
SHA-256: a22d83aeb72de220efaab9b5fe35f6301dec213337fe2de593854218926cb890