Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0027b78bada26be…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 21:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: abfd51f9158d696ebc588ab4cb712fc3 SHA-1: a9196b7ba8a08e2f8ccf6894c1332fe65f66f30c SHA-256: c0027b78bada26be1aea137765c33ca05945d7141125ae043b84f7e965b20e39
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to lure users to potentially malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's likely part of a phishing or malware distribution campaign, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/wix?keyword=glencoe+precalculus+chapter+1+pdf PDF link annotation
    • http://winclean-shop.space/twilight_breaking_dawn_part_1_soundtrack_youtubezh59i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_60474a6579de0.pdfIn PDF document text
    • http://fastpeysistem.online/dream_of_teeth_falling_out_rotten7hcjh.pdfIn PDF document text
    • http://it50save.info/true_blood_season_4l5zwn.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/kebutupup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_600cca5e3aa5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5fdcefeb26817.pdfIn PDF document text
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/8418618cd28.pdfIn PDF document text
    • http://aazzzry.space/green_tea_innisfree_sheet_mask0onsc.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/gZd043l/zuvatatuxajuvipumopirubu.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/jzjfii5/tedopeno.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/synonyms_and_antonyms_worksheets_for_high_school0k22k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_603f0705dbfd1.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/vajaxuxorex_rujatupuw_defagiwewupo.pdfIn PDF document text
    • http://birjand.design/primary_assistant_teacher_exam_question_2020n1kpa.pdfIn PDF document text
    • https://lixibagiz.weebly.com/uploads/1/3/5/3/135348296/sazisinalaxe.pdfIn PDF document text
    • http://kositexujir.sportsontheweb.net/48104809227.pdfIn PDF document text
    • http://plafond.xyz/car_sale_agreement_template_nzo64f2.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/ic45rAs/jovib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidugozu.atwebpages.com/wishcraft_barbara_sher.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/bielle_manivelle_cours.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 3664 bytes
SHA-256: ac66f249644e4521da6a320da331c8969f02450b299b288ef2552f0e90563433
font_01_sfnt_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 5328 bytes
SHA-256: 257e4f115854bac05e461f9025993c479bdb787f5b940b1d786b1eee58c0333a
font_02_sfnt_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 10372 bytes
SHA-256: 603eaa9d755698114ee38d27302b23532416d60f55cd0e300d850f994f273109
font_03_sfnt_off00010b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0D 16112 bytes
SHA-256: 62b559721a6967c5225c022894fd12f25c9dfad26b1ecba2375fced28481320e