Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1055f4cbffcc81…

MALICIOUS

PDF

66.6 KB Created: 2021-02-12 01:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d118da2797e19c6d124babb95d487a49 SHA-1: 30c02090d48ddb999ee774e4fbf16ef1e2484c79 SHA-256: 6d1055f4cbffcc81cfa10f16603209fab14f2ae4e5098bdba6a10131739e6262
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://leonvi.ru/wix?keyword=the+impersonal+life+joseph+benner+free+pdf PDF link annotation
    • http://dovavetupal.22web.org/sofefuroxegifoxugaja.pdfIn PDF document text
    • http://nemeloru.66ghz.com/15303386736.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/sakomiri.pdfIn PDF document text
    • http://zuvakaxosamota.22web.org/ak_47_ringtone_song.pdfIn PDF document text
    • https://kanodofeju.weebly.com/uploads/1/3/5/3/135325650/gejimowamixel.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/573493.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/93fde0d13e.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/ruxupomuzolo.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/vitadobekila_kexepama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_60165c6501ac3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5ffca0868c69a.pdfIn PDF document text
    • https://selegisazo.weebly.com/uploads/1/3/5/3/135323244/lenilita_tidamo_nuwuwid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_60030c5030bb0.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/patagusare-giwapoguxenej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408482/normal_5fdf121ef129b.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/zonebon/spring_resttemplate_json_to_pojo.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/housing_reference_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/51445027697.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/expenses_budget_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/windows_10_1903_offline.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_off0000c88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 5444 bytes
SHA-256: 988686efbde9d9a0896dc833b660dcd58e3ee3c4234b8e95b8cc0c8a24635c6f
font_01_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 10080 bytes
SHA-256: 2a600cb4b8af59c82e9e61ec088047d62d8b059226f4705aba1ac06ae032b93a

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