Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcd334f91c8e710…

MALICIOUS

PDF

79.7 KB Created: 2021-05-22 13:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 96e1bcc19a9a723b56eb83aa4b5b6d19 SHA-1: 4e33cf907210381254aa410bdaedf7bd3efdfcea SHA-256: 0fcd334f91c8e710c236c127e33383153c54f7b617d0a6c8ab17b43de108e0a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious sites, aligning with phishing or malicious content distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=how+to+write+on+cards+with+cricut+explore+air+2 PDF link annotation
    • https://wopixidotawus.weebly.com/uploads/1/3/4/5/134506387/rifudakako.pdfIn PDF document text
    • https://voliguxuzewiwa.weebly.com/uploads/1/3/4/7/134762967/zaxazalu_rovijesilumapit_fikuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_60656d8bcd003.pdfIn PDF document text
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/9570816.pdfIn PDF document text
    • https://xukopalobupekon.weebly.com/uploads/1/3/4/7/134730613/tokukiliweginudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c79c83255.pdfIn PDF document text
    • https://voganesabif.weebly.com/uploads/1/3/1/1/131163538/b9b22166442a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_6001314adb751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493916/normal_6027ba8a9d64f.pdfIn PDF document text
    • https://nudabubi.weebly.com/uploads/1/3/4/3/134323665/841811.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/dudidelevemeb_fujawuwakinize_zatasivizilu.pdfIn PDF document text
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/85b80dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_6063d43a90776.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/wuxupewu/the_product_of_a_positive_integer_and_a_negative_integer_is_always_less_than_either_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8e256a-92ef-4e9b-8684-e42503ad9068/kevotefukugugob.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/58825005914.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/17548687904.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/what_is_the_formula_triangle_for_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/velocity_and_acceleration_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/watch_how_the_grinch_stole_christmas_1966_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c048d863-72c0-47ea-8466-5433d6976e3a/how_do_you_pronounce_the_funny_b_in_german.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/how_to_open_maytag_centennial_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/ballistic_movie_2018.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_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 5412 bytes
SHA-256: 326140792feafbfaece7f24b098c314172ca61f06a2525368467df8f0a7f1da8
font_01_sfnt_off00010c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2F 10868 bytes
SHA-256: 18ed1b1ef8871ea8faaccfc4a891af5ab9fbbd5f60cf5fb1e4eac2b8af3c4e50

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