Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb56229a41a1a431…

MALICIOUS

PDF

63.9 KB Created: 2021-02-14 20:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 81000e105cf25d49b57d75612f851285 SHA-1: 20abc4a50dbf810316b163cd961690258af290ea SHA-256: bb56229a41a1a4317d036199d06db68a34805cf073d536f8fcfd0415a2c674a0
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/wix?keyword=anunian+theology+muata+ashby+pdf PDF link annotation
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/715436.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/GhaLhdw/xomotigonenifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fd1bbfb804bf.pdfIn PDF document text
    • https://taresazafo.weebly.com/uploads/1/3/5/3/135335901/de2d4.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/885318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fcaef097aa29.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/vjheji7/tesomavabiner.pdfIn PDF document text
    • https://cdn.sqhk.co/miranilu/bicAJha/tesinegoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460230/normal_5ff33086d7deb.pdfIn PDF document text
    • https://cdn.sqhk.co/wiradimabid/gAoiaig/lord_of_the_clans_book.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/ibjfFij/sonic_the_hedgehog_classic_download_fan_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490918/normal_5fe5a23865c12.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/lodazojamuva/tajalamase.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/advantages_of_a_franchise.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/48471162034.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_off0000be33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE33 5588 bytes
SHA-256: b9b5cbc9c7fc87745ae64da8e0da190be94890b3b2dcee4f50324998035adbae
font_01_sfnt_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 9852 bytes
SHA-256: d88106fa370ad9aebe461c79d61469ddbe7b9dc7900a5afe49ebbc03aa9bd654