Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdfed5c59840ad8…

MALICIOUS

PDF

67.8 KB Created: 2021-02-26 21:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c18e51d4c3e880caa58536793ce426a7 SHA-1: 192dd10a9e99d852466d1a087d65c9dc2b435fc9 SHA-256: 0bdfed5c59840ad8b523d89e84cc119d37cd77130646ee494582c3514d786a9d
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://golowaki.ru/award?keyword=what%2527s+wrong+with+black+ice+air+freshener PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367903/normal_6023ff50f1c92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5fc59902bb168.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/zejaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5fe6ede64b365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409403/normal_5fe2ca4969bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_602ab9a94d9be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_600675ef4b267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500678/normal_5fcae6f47f168.pdfIn PDF document text
    • https://goruxevuretu.weebly.com/uploads/1/3/4/8/134851502/5004845.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/iqgiqhg/tesojof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_60014997b3a9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_60059fc183340.pdfIn PDF document text
    • https://lekusilikeveb.weebly.com/uploads/1/3/0/7/130739001/dukifik.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/cnb_magisterio_de_educacin_infantil_bilinge_intercultural_-_completo.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/tobaziw/environmental_science_merit_badge_workbook_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/factorising_quadratics_differentiated_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/zojanam.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/fugimekozaguvejid.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/77641917505.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/electrolux_vacuum_repair_shop_near_me.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_off0000c9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 5488 bytes
SHA-256: b2b0bb5e70367bcfc17d107d566e11a16c4f952833b40d900901f142adb31c27
font_01_sfnt_off0000dc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 10508 bytes
SHA-256: d9db138a4ae3ba2c6fa06d13074871e824fb758ce555310319ca553c7f044d42