Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ee73dda9026603…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 08:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 78ee2312b110c5967a6b802612b9f536 SHA-1: 2713802effe87628909c57f4f4e83bd71704775e SHA-256: 17ee73dda9026603f407fcb6d9b234fe57220c9b4913f1dd506c8384c01434f5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('kuzutuzo.ru') that is likely used to host malicious content or redirect to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to direct the user to external resources, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=backtrack+5+apk PDF link annotation
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/rasatotukoga.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/4910581.pdfIn PDF document text
    • http://ctuxuu.com/7369863629335n8r.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/22207222683z4r4u.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/5852798.pdfIn PDF document text
    • http://trokot-online.xyz/toca_kitchen_online_free_playjmw13.pdfIn PDF document text
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/6386396.pdfIn PDF document text
    • http://gulibuxexazagep.iblogger.org/parasitic_diseases_6th_edition.pdfIn PDF document text
    • https://vuzidupujesezo.weebly.com/uploads/1/3/1/3/131398219/7b6d3442bd1f.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/vukumesoj/dokakogabi.pdfIn PDF document text
    • http://subezonaziw.rf.gd/class_12_accountancy_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/what_does_lifestraw_not_filter.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/blackpink_whistle_instrumental_free.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_613d29a2ae694841ba6df2340dcd67e7.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_2f79594385e04f69b6c4fd4f61190f59.pdf?index=trueIn PDF document text
    • http://kinifojuno.epizy.com/wurifanujuv.pdfIn PDF document text
    • http://birotizedu.epizy.com/alter_ego_full_movie_free.pdfIn PDF document text
    • http://fipotunisobojow.epizy.com/bolol.pdfIn PDF document text
    • http://jefesipi.rf.gd/swot_model.pdfIn PDF document text
    • http://pulilidason.epizy.com/37605680372.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/satixorogujatir.pdfIn PDF document text
    • http://zivekano.epizy.com/gmat_book.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 4956 bytes
SHA-256: 83681f55b8d43c26ad12c9282236d0739e8c6aa3491f8764d93a7cd503137048
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 13132 bytes
SHA-256: 33be51acad07431802520d85900655101704ce59435fb409d0327770be675c8b

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