Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f32d3563180450b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 04:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 901da47ad55cae941ca0ff2614590e57 SHA-1: de01d8340f573159be2940ed99263d1535a94a51 SHA-256: 6f32d3563180450bec831eb0627ecabe49c47667c2074b91b0a83ac5aef2fd13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/wix?keyword=tree+of+savior+bullet+marker+outrage PDF link annotation
    • https://cdn.sqhk.co/fopikudapom/NiaVieZ/jipewegoxe.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/practice_sat_tests_printable.pdfIn PDF document text
    • http://mafaregasinuviv.22web.org/73177642147.pdfIn PDF document text
    • http://zofoxexizoviro.iblogger.org/tata_bye_bye_song.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/2006_honda_civic_ex_coupe_third_brake_light_replacement.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/63733538039.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/drgdifr/6884844452.pdfIn PDF document text
    • http://depusapo.mypressonline.com/avian_diseases_manual.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/academic_english_words.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://degevojorak.myartsonline.com/aptitude_test_papers_of_software_companies.pdfIn PDF document text
    • http://dofovomomame.epizy.com/film_analysis_example.pdfIn PDF document text
    • http://bedegexemizi.epizy.com/1572113468.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/6780721973.pdfIn PDF document text
    • http://befojarariwowab.epizy.com/7437467593.pdfIn PDF document text
    • http://xivutunitilema.epizy.com/medical_terminology_chapter_15_answers.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/89110081037.pdfIn PDF document text
    • http://pefodajisotavuk.rf.gd/pegewesanovajalupesuradiv.pdfIn PDF document text
    • http://kokidali.rf.gd/best_universities_for_public_administration.pdfIn PDF document text
    • http://duposul.epizy.com/40502303347.pdfIn PDF document text
    • http://rulenanevatetid.epizy.com/xuzelebomoruvizezetusuri.pdfIn PDF document text
    • http://fafebexa.epizy.com/dls_18_all_team_logo.pdfIn PDF document text
    • http://golofupatawef.epizy.com/sozaber.pdfIn PDF document text
    • http://fugovolit.rf.gd/michigan_agricultural_tax_exempt_form.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_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 5300 bytes
SHA-256: 4a5146aac142107a48238de251ddef76823d0a99d8d0c65f83b701e7e5561c42
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 11188 bytes
SHA-256: 06e711630e2b6f49e368c0d29b2fdfe1452f1c03d6e6675fd8086c0b9164c3b1