Malicious PDF — malware analysis report

Static analysis result for SHA-256 c136ed00f5e8a638…

MALICIOUS

PDF

115.6 KB Created: 2021-03-23 02:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0c1e7c3cab0ee46c76853e625b5b6946 SHA-1: 2345fd875554bb4a9d32daef404a9d379cde38bb SHA-256: c136ed00f5e8a638d2cc2b0e4624eb317c2c2ffc1829ba7f2e840179d5bc5978
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable hosting domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'The jack tales by richard chase', likely a pretext to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/strik?utm_term=the+jack+tales+by+richard+chase PDF link annotation
    • http://xifadezuzurap.medianewsonline.com/color_by_number_halloween.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/catalogue_distribution_electrique_schneider.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/les_miserables_original_broadway_cast_album.pdfIn PDF document text
    • http://storeeu.info/dususegivewubkuzk.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/294971119.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/369153179452iwnc.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/jaspersoft_studio_subreport_expression.pdfIn PDF document text
    • http://bizewisa.iblogger.org/lugenibisugegusipowi.pdfIn PDF document text
    • http://usesucre.pro/mekuberodp3trw.pdfIn PDF document text
    • http://wtia.space/kenmore_dehumidifier_70_pint_how_to_useconjd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevidubigozexa.rf.gd/sevasuwerukegogol.pdfIn PDF document text
    • http://fufagarafe.epizy.com/ca_association_of_realtors_rental_form.pdfIn PDF document text
    • http://xaviwawav.epizy.com/23205210824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2242bbb4-dcb8-4fa5-9a26-db08c2aa1558/95053922100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dc7779-d286-45f1-a4a3-453b08b3e4f8/sivazod.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/mekodovegimeturipivan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436a5904-f8d9-4322-83b7-71371ac041cc/1340424734.pdfIn PDF document text
    • http://muvubavove.epizy.com/pezusinuxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325b8577-dd10-4c4e-b55c-b4898e2ed331/who_are_the_giants_in_norse_mythology.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/zawujamemozigifumetunof.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/33502861202.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/disclosure_statement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/automatic_call_recorder_hide_pro_apk.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_off000187bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187BD 5356 bytes
SHA-256: e62b97d1f3310a78cba6e01bb3039ebd650af53ffd035dfab1c073c38bed31e3
font_01_sfnt_off000199ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199EF 11064 bytes
SHA-256: 600aa6b143f260473e67e322f8ee13cec3cd3b6af0388422f4e371d3850d6cf7

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