Malicious PDF — malware analysis report

Static analysis result for SHA-256 c962b1029ac762c9…

MALICIOUS

PDF

69.6 KB Created: 2021-03-31 16:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c3b9917895a9e9890326bc89fb4bd373 SHA-1: 14552b03ed82ded8a634ba33fd3ee086b7b4db2a SHA-256: c962b1029ac762c9409745137d6faa49918a6cf9dff9a8ae5d55b181a847f350
126 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with at least one, 'https://resalured.ru/strik?utm_term=dish+wally+remote', pointing to a suspicious domain likely used for malicious redirection. The PDF's structure and the presence of external URIs suggest it's designed to lure users to external sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=dish+wally+remote PDF link annotation
    • https://cdn.sqhk.co/pilimisoduk/ifijSd3/business_accounting_services_pound_va.pdfIn PDF document text
    • http://greyfruit.space/what_is_the_meaning_of_the_poem_still_i_rise9a22s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_604d798e18fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_60186922d7e89.pdfIn PDF document text
    • http://trynon.xyz/kasopotumokafugogep8cwt.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/Gvyz3id/vexur.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/154122519809ob7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_5ff9b8c0cb0da.pdfIn PDF document text
    • https://cdn.sqhk.co/fejezolixo/vgdgdwI/aston_martin_vantage_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/2jjnQgi/wavowopigeluta.pdfIn PDF document text
    • http://wersita.space/geography_quiz_with_answersxdc0s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_60015e85d7e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_604d294b08e6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_79e0073810444472a2a98f06be7e6106.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/free_music_sheets_for_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e688c8-4999-470a-b347-00fc7f0870a7/sasufa.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/it_security_management_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423a9e44-d316-4c02-9901-1ea577c61dda/ziganu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf566cf7-b3b5-460a-9392-bbabdd8b4a42/kaviregigaliselozak.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_2939a2c664ad403f80a3d21217095fa7.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_f2528558012340608247ca283187055c.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_eed2feafd6794b64aae9b0bed0973555.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/apulien_karte.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_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 5120 bytes
SHA-256: 28bc52931c40681d7a9f48a61eda13a467313a7cb0d447ebb13df8da8b81c476
font_01_sfnt_off0000e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 10588 bytes
SHA-256: ccc149b26f809440e8b3b6ac2a8b008fbf2c77c029f3aaa4a93d88cee46052fa