Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cea1b86c739169…

MALICIOUS

PDF

82.1 KB Created: 2021-03-14 00:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55df7b99b7d143863db415afb2fc9194 SHA-1: 07ceb607ecead6b1b8f05a3b6c60f7f8954099ab SHA-256: 26cea1b86c739169ee2382c8d83a70051b2ef5aa17234a27fa60052b9d6ddf94
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation and potentially search terms, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+to+use+irobot+braava+380t PDF link annotation
    • http://vozivovog.scienceontheweb.net/dulewatozipiboregusev.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/36244145737.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/kotipagedeno.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/babanaxopakexulotafasalon.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/how_to_make_money_in_stocks_with_little_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimevuda.rf.gd/bioshock_infinite_save_location.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/freak_the_mighty_you_cant_judge_a_book_by_its_cover_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c4b746-a0a2-4a61-8a35-94d1b360e001/how_to_you_define_religion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575808d7-e4d5-4062-acd8-d6ceee24841e/41291108596.pdfIn PDF document text
    • http://zejenideve.rf.gd/how_to_put_a_bobbin_in_a_brother_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/42994098068.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/define_feminist_criminology_in_sociology.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/pulofodonunurenewenukibag.pdfIn PDF document text
    • http://palomidifigur.epizy.com/fosotegekab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650d2460-d7c1-427e-816c-bcbdf23babf4/36138843248.pdfIn PDF document text
    • http://ditumok.epizy.com/can_you_be_a_graphic_designer_with_an_associates_degree.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/jakexatagidusanurito.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/fluorescence_quenching_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc95430f-ca1f-4499-9175-674d332a922a/gesafawiwalozapopugojusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d205a6e3-c492-49fc-a3b5-8d947cd61706/soundarya_lahari_slokas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6aacd7-a87e-4640-9fd0-22e8d1bbd05c/casio_wk-500_76-key_digital_keyboard_workstation.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_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 5400 bytes
SHA-256: 4c9393deb41c7a2d78ed9c92f4f804ceb2536d9b0b093fc8fd09f23cacd3a9c0
font_01_sfnt_off00011222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11222 11792 bytes
SHA-256: e297e40011b0e1e30d5a2c56345e8b3b0ab1968d3b2542e3f2ffe28b2ccf623e

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