Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7209c133dab2908…

MALICIOUS

PDF

109.6 KB Created: 2021-03-22 01:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6d5ec04b4fb9ff20fe80fde2f91e161d SHA-1: 7c977b1ac169aebb77f67315cced3a0c6e64b9f2 SHA-256: b7209c133dab2908f7b222fa098d94497a75932cb1dc102ff54e9b5dbe74eaca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://mezovuduw.ru/award?keyword=sociology+project+topics+and+materials+pdf PDF link annotation
    • http://kyukty68.xyz/is_war_and_peace_the_longest_noveloukpb.pdfIn PDF document text
    • http://dontbeshy.xyz/69060295126pxaaw.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/antigeno_y_anticuerpo.pdfIn PDF document text
    • http://zurafumodajirof.iblogger.org/bsc_chronicle_magazine_download.pdfIn PDF document text
    • http://tehnopolis.org/direponewalavamedimeff4nj.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/subifukinav.pdfIn PDF document text
    • http://natikolom.site/sharepoint_open_in_adobe_not_browserjz9an.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/authors_purpose_lesson_6th_grade.pdfIn PDF document text
    • http://wapuwesifatirok.iblogger.org/jopisixiwi.pdfIn PDF document text
    • http://puwobero.22web.org/ritogafiredisi.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/ceremony_definition.pdfIn PDF document text
    • http://malemukinupogeb.22web.org/format_large_xml_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zojusis.rf.gd/tonuxufibikom.pdfIn PDF document text
    • http://bimomog.rf.gd/how_much_does_it_cost_to_rent_a_cessna_182.pdfIn PDF document text
    • http://winibivazizi.rf.gd/84224216066.pdfIn PDF document text
    • http://fafalibowadavuz.rf.gd/stakeholder_relationship_diagram_template.pdfIn PDF document text
    • http://vipaviveza.epizy.com/ascaso_dream_manual.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/dipoxopetirob.pdfIn PDF document text
    • http://kenuxikoluwi.rf.gd/kofuvozezeso.pdfIn PDF document text
    • http://rebubokinore.epizy.com/adjectives_words_list.pdfIn PDF document text
    • http://likasiz.epizy.com/blood_type_diet_free.pdfIn PDF document text
    • http://depevabevidot.rf.gd/70608907355.pdfIn PDF document text
    • http://rejazimuperolik.rf.gd/31995625721.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA2 5544 bytes
SHA-256: 195ac4f53a98a1c29107b56f98c7c613a1f5a3fd53aa8525d4f1e4d3fe385317
font_01_sfnt_off00017162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17162 11704 bytes
SHA-256: 671f4e7f59d3ad7292e6fbf34e17f3ad833ebbe5d136055220a27df4321ad3d3
font_02_sfnt_off000198a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378