Malicious PDF — malware analysis report

Static analysis result for SHA-256 5282d6a63ec66c77…

MALICIOUS

PDF

71.8 KB Created: 2021-03-06 07:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f24da3a14a31f33f8c43fa3d619149ae SHA-1: 4a8375a921eedb70f3161549eef2f5e2f819cc69 SHA-256: 5282d6a63ec66c77d79b8f0b86396ddd055fa50f90b725aa14df4a6371bead70
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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.
  • 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://golowaki.ru/award?keyword=cognitive+behavioral+therapy+tips+for+depression PDF link annotation
    • http://pakizimavom.scienceontheweb.net/kenmore_coldspot_refrigerator_light_bulb.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ggdbSKg/repomekiderepimave.pdfIn PDF document text
    • https://cdn.sqhk.co/gufulixofoma/1gcigqB/ghost_rider_3_2018_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/jetekujob/SheRgd9/58014274237.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/ciihghS/28836319980.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/hdjjsj0/cruise_companies_ranked.pdfIn PDF document text
    • https://rikodobuged.weebly.com/uploads/1/3/1/6/131606346/14f7999b119a.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/3170779.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/xonokati.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/how_to_check_your_birth_star.pdfIn PDF document text
    • http://vofufime.mypressonline.com/jukipizuwukotajijupulek.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/panasonic_kx-tge270_factory_reset.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_9b4a27499d6f420e904994748901cc1d.pdf?index=trueIn PDF document text
    • http://jisijuvod.myartsonline.com/hp_2013_ultraslim_docking_station_2_displayport.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/how_to_install_a_toto_washlet.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_ff9e6d0ad9b6418784118c88b528dccb.pdf?index=trueIn 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_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 5508 bytes
SHA-256: 90e54c1588fd2ff9f829d73d9552b3dd092943f9a3e9269423991885e9581f3d
font_01_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 10608 bytes
SHA-256: 4c4af7fee6b4b55d203551dd1a107268241dd0216dd65044c2d8fd7a7e78b197

Open this report in the interactive analyzer, or submit your own file for analysis.