Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedafc7ac33f6fd3…

MALICIOUS

PDF

66.8 KB Created: 2021-02-15 08:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 44e7cf0cb6da01fba59f382310b8e1af SHA-1: 47b5fc8138f8bff7904af51451d8b6481a2a4e9b SHA-256: bedafc7ac33f6fd3f6961ebd571c054c250deb87b90a2e2b162a3c4600c67b1b
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/wb?keyword=background%20png%20for%20picsart PDF link annotation
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/vapijumumapelugeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fe149339f512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fc7d15906473.pdfIn PDF document text
    • http://muwosolop.22web.org/bunakepu.pdfIn PDF document text
    • https://zunejekuriraruk.weebly.com/uploads/1/3/2/7/132712234/fowovixu.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/4da8ba8e00b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_5fcee7de9bb09.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/9322791.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/piradi/brittle_deformation_and_ductile_deformation.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/gadafudaloripive.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/caballo_de_troya_libro_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/16992526111.pdfIn PDF document text
    • http://magivaxinel.rf.gd/psychological_assessment_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/96105702114.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/32739514568.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_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 5404 bytes
SHA-256: 0fc54645a3dc972af173e36759f56cd18e31d465db9faccdc1621bbf758fe2cb
font_01_sfnt_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 10388 bytes
SHA-256: 4352f529006a7838033e54d12b2bad74e6ac34354309466178a4e00b69b3a563