Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62ff7aea9209f13…

MALICIOUS

PDF

72.3 KB Created: 2020-11-03 15:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a9ff5a60942212e1149c97503909e20b SHA-1: 4ebd6ada538ec9e34a3669cbc060fcfc03d57e1b SHA-256: d62ff7aea9209f1349d376e7b894d0f560cfc83a86ae93f74641039fb86f3860
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=nastran+quick+reference+guide+2017 In PDF document text
    • https://vixepakezo.weebly.com/uploads/1/3/4/4/134447938/2774795.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/1893061.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/63dbe87b0.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/xibemusexomaxotoz.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/tomefibejoguzipif.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/minaxo_biwemunaluzev.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/7dc0ea71b02.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/napoledunadigo/pawunarida.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/types_of_engineering_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5d2c20-73fd-4478-9097-b9114766a7bd/51124621827.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/kingdom_hearts_opening_song.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/ballys_fitness_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/96956542528.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/corresponding_alternate_and_co-_interior_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vofosuvuwapiwo/37173742999.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/72229578548.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/advanced_excel_charts_and_graphs.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_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 5720 bytes
SHA-256: 7498e7e53db6f1ea0154068f6edd091a1333e03a3901a94f65449223db12f079
font_01_sfnt_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 12200 bytes
SHA-256: f65f4195c44ceac1df722f917607a90fb09596b0a1997eb71da799033f295fa7