Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea02203f3082f482…

MALICIOUS

PDF

72.3 KB Created: 2021-02-09 23:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bb13d7480e27f9447a09d02055a23cd9 SHA-1: e8b6a175f92f3a0bd1eb296a93eb512cd394116f SHA-256: ea02203f3082f4822c3f79470e6b1ec0c8f92174b56df6e630bd7eb31e090b5a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document acts as a link farm, directing users to numerous suspicious URLs, one of which is embedded directly in the document's metadata. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a tactic to distribute malicious links across disposable hosting. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/aws?utm_term=organic+chemistry+questions+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388274/normal_600db58f1efb2.pdfIn PDF document text
    • http://lofitner.buzz/kepokonunamutagewavisezodgrha1.pdfIn PDF document text
    • http://tranquils.space/fumogogaruwadifeferqgi3w.pdfIn PDF document text
    • http://allieshouseofhope.com/libesonafoduzasiputufovux4zlhq.pdfIn PDF document text
    • https://cdn.sqhk.co/topefebi/is16ijR/84839374336.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/wizevip.pdfIn PDF document text
    • http://premiumpornclips.com/29813029976wwu9a.pdfIn PDF document text
    • http://siankaanmexico.com/license_plate_lookup_free_californiahg13z.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/AZihhrN/pic_word_level_138.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/aztx4he/sudoku_online_free_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_5fe7d29acb146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_6006f09c60e33.pdfIn PDF document text
    • http://helpcontactform.com/wisc_iv_manual_moderno_flanaganbcz92.pdfIn PDF document text
    • http://propovar.ru/60774097204sjdu8.pdfIn PDF document text
    • http://leafester.online/fijerolelegulugbifzb.pdfIn PDF document text
    • http://axacheat4.xyz/wajuwosenujaxagorijupf5uud.pdfIn PDF document text
    • http://fitness1.space/matrixyl_synthe_6_side_effects5q6zx.pdfIn PDF document text
    • https://nusemidokiz.weebly.com/uploads/1/3/5/3/135395372/8118958.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/meladifavebuforofe.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/fazagel.pdfIn PDF document text
    • http://khareedforosh.com/ayodhya_kannada_videosqt361.pdfIn PDF document text
    • http://lazadacostumercenter.com/mtv_unplugged_in_new_york_nirvana4x2ty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 5884 bytes
SHA-256: 3dc7b8d3bdde4f7182b9884b462ffc307daa16816cac5ec66ab80b55c238d593
font_01_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 10620 bytes
SHA-256: 58bcd904e1ca292e544aebb31863e102b0dd4908b0058bf600adb4098f33bbb8

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