Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb5514f45362528…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 12:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9d1453a79868ca85e98406c0755d7647 SHA-1: 1e1d9ea23ab749961fc0ac86d75e90cd390c93fd SHA-256: 6cb5514f4536252822c947115687f2a56abc45325551aafed08c76f47414dd25
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=psychology+chapter+4+quiz+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488139/normal_5fd7f420bde18.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/Agg1kP7/cross_stitch_embroidery_pattern_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/txf9ihg/lathe_speeds_and_feeds_for_mild_steel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475000/normal_60014e3c1d84a.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/jlhhaKX/slots_of_vegas_free_chip_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/ijzid62/bubble_empire_champions_level_124.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/bgdjhTd/60028537777.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/gdhgtot/the_academy_the_first_riddle_walkthrough_chapter_3.pdfIn PDF document text
    • http://pifezix.22web.org/sizadoditunelit.pdfIn PDF document text
    • http://zinepifulew.22web.org/desktop_calendar_design_vector_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/ijcjma0/girago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5fe9367fb3bf8.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/loneminovu/aglc4_bibliography_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/jobowixibaximel.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/yajamana_film_basanti_song.pdfIn PDF document text
    • http://nemebikox.epizy.com/17270352085.pdfIn PDF document text
    • http://delenujafoxa.rf.gd/sarudetujurisefomeduf.pdfIn PDF document text
    • http://walugiguzav.epizy.com/red_iguana_lizard_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/samovizebaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/internship_program_template.pdfIn PDF document text
    • http://xewenofos.epizy.com/teamviewer_min_ph_mi_nht.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_off0000d838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD838 5652 bytes
SHA-256: 2068ba538ae527250be378f800cbe3f29fccbbfc3e4c23dec8d6244e00ac0d07
font_01_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 10132 bytes
SHA-256: aa3cfeae19ad7796c926fb61bbe602a3891c17d07e3fb72cde889f0033465f5c