Malicious PDF — malware analysis report

Static analysis result for SHA-256 30426feda0a600f6…

MALICIOUS

PDF

99.7 KB Created: 2021-04-06 11:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f8a9a99af67df203760ac51fa7e1c4df SHA-1: dcf1ff660fec1eabb2c54d96b95fed7081963f09 SHA-256: 30426feda0a600f60de6f49be1cae365a75a2844b5f91e0849068c4f44dfb280
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 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://kuzutuzo.ru/strik?utm_term=karcher+hds+1195+service+manual PDF link annotation
    • http://classicalnaturally.com/43772507334c70qj.pdfIn PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/1ab82c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5ffd1155626b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_603eab7390e86.pdfIn PDF document text
    • http://helpverifybadges.com/journey_to_the_center_of_the_earth_2008_full_movie1cplk.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://saudiautoinsurance.com/56269716748s1kb3.pdfIn PDF document text
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/wupesuzofekagokekew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_5ffca1a55d969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5ff307d368925.pdfIn PDF document text
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/segabifuwa-muvimeride-xuzitu-teduwofak.pdfIn PDF document text
    • https://pojebozotez.weebly.com/uploads/1/3/2/6/132695867/4971652.pdfIn PDF document text
    • https://cdn.sqhk.co/bijowiroma/x0Uhcib/figagusolevuxajiwasuj.pdfIn PDF document text
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/39f841c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6010e5c3883c9.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/dugiief/56145836339.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/iLhbThg/foxumibokila.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/hcgiUVh/4981397969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385422/normal_5ff5c12a4c9e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_5feff6d790065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600afb95b0daa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91cdfb4-9cf8-45df-92fe-3a92c0d39db1/how_to_set_up_mitel_5312_ip_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defaa95c-984a-4ce9-9f48-eb96031544c6/lobejipodupuxoxivote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f431067-f5ac-459b-9377-ca79a4b48375/can_i_get_amazon_prime_on_roku_streaming_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8221bb03-e592-4b19-8966-7adafb2e665f/pijurifajarogosakefizikuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2858960-a769-4e58-ac5d-f7ea8b90e8c0/the_consolations_of_philosophy_alain_de_botton_review.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_off0001459c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459C 5540 bytes
SHA-256: 33751d9dcf9ca12c7389b6d46273651a89ec3c0a923bc75ed5e715c752f03019
font_01_sfnt_off0001585b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585B 12144 bytes
SHA-256: 9ff006d88aefb58c32360e6ee77df2d7939db43632e4b6558a08c95f5bbf3a29