Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f5c102b38d0572…

MALICIOUS

PDF

77.2 KB Created: 2021-02-03 22:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 91ba72b0b125ca3c8ff595497f889925 SHA-1: bcc56d2566de6fb175baf2ba775be89c770a0e8f SHA-256: 53f5c102b38d05728ef0a8f66e874614325cde6d5172b507953eb6cce6b3efe3
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://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/9bee85cf4eba8ea.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://baarspo.ru/aws?utm_term=credit+report+freeze+pin PDF link annotation
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/9bee85cf4eba8ea.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/smartwool_base_layer_150_vs_2501fbe1.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/8642143.pdfIn PDF document text
    • http://doctora.club/life_after_high_school_joyce_carol_of9rly.pdfIn PDF document text
    • http://thechambre.xyz/i_shall_seal_the_heavens_epub5967r.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/bujabidawarupirovapu.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/8505224.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/rifakup.pdfIn PDF document text
    • http://foyou.store/canales_ecuatorianos_en_vivo_apkzhjzf.pdfIn PDF document text
    • https://fawewunukeni.weebly.com/uploads/1/3/0/7/130739651/c7c64e.pdfIn PDF document text
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/ac2c7e93ab790.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/kukazowox/airlift_performance_how_to_drain_tank.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/81743045202.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/caching_strategies_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/japanese_to_english_dictionary_book.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_off0000f41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 4572 bytes
SHA-256: 18ef2791401ad06ba8c4d676ae9b68481e2f85c4406a3ef1f23c90bb805c0a14
font_01_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 10744 bytes
SHA-256: 715160202d719fc1137bda612eba8002e8fb490962bb0b40fb1268ac89cf93f7