Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6688906c1f4f6e3…

MALICIOUS

PDF

64.4 KB Created: 2020-11-26 01:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 86c87c2be50275b44a8d0c52d1df7ab7 SHA-1: b57df66a9ea17c711e991304a0a7c9e054cb3a02 SHA-256: b6688906c1f4f6e3e4f6b2cc231638529bec614589ecbf27ed2d9c747e616f6d
196 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
  • 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://traffset.ru/aws?utm_term=glasses+hd+png PDF link annotation
    • https://basurujilitafap.weebly.com/uploads/1/3/4/5/134595952/75c2ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_5f9f423039907.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/991770d0a5d3.pdfIn PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/237228.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/fasanag/21623302424.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/zuxelatunubixopetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0e42b3-f5ec-4ea5-a043-0ac45b88abf6/fibasunivoladogumoxafexib.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/bagajodagepedowenodotepe.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/26525834899.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/29558467791.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/bamemivevonalosoruzebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb7a60c-f049-4e43-9e1e-23e3fffd6714/12612026756.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/humminbird_587ci_hd_di_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/definition_of_technology_integration.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/64517974468.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_off0000bd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD92 5156 bytes
SHA-256: 809f60972cbf02682445e141a948922da6574d35b62ed9595eef039819dccba4
font_01_sfnt_off0000cf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1C 12116 bytes
SHA-256: 727d0698f38ea435b5829492d066365f7b7bcb61ee2eae07174330ac9150c997