Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c6dbe97c06b3d4…

MALICIOUS

PDF

66.7 KB Created: 2021-02-22 19:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3480329ff313fc7cd3eab40f52e503c6 SHA-1: 8db506f897b7e797a61c8060c2e82157d59f27db SHA-256: 21c6dbe97c06b3d4b99c36db760d1d35a34c65dd1504fce2c08e8f7d60445fe1
186 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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/52e04.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=chapter+14+answers+to+kill+a+mockingbird PDF link annotation
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/52e04.pdfIn PDF document text
    • https://penizamuravepu.weebly.com/uploads/1/3/5/9/135976181/xokovo.pdfIn PDF document text
    • https://velineninebag.weebly.com/uploads/1/3/4/6/134608195/ddce1.pdfIn PDF document text
    • http://qqkaxes.xyz/lalitozovubefolox0vak.pdfIn PDF document text
    • http://taher-tcac.com/ninja_foodi_grill_walmart_canada4dbox.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/puvixeb-wasilirawazesa-rosekoxodibub-gisonotafenufun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_60138ce62898e.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/bhfjd4Q/fidukuxofatajobotawaj.pdfIn PDF document text
    • https://fenonurel.weebly.com/uploads/1/3/1/1/131164034/lunox.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/6832791.pdfIn PDF document text
    • http://idealicaitaly.site/semiwelorefasa8wv3g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_60275da725f8e.pdfIn PDF document text
    • http://regse.website/48753180665z5zsu.pdfIn PDF document text
    • http://lestyprin.online/weekly_food_diary_template_word1s2kk.pdfIn PDF document text
    • http://mx50off.pro/nostalgia_electrics_popcorn_maker_assembly_instructionsre2ox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 5828 bytes
SHA-256: b9076dc33c01aab1b1a530bdf10c42c76a0667b560b30d5a63f71ea7deed6313
font_01_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 10132 bytes
SHA-256: ecb53567194877b4031f3e00ab9d7e80673e1332b35e7026e72668d819ebe4b2