Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb13133b00df44e…

MALICIOUS

PDF

75.4 KB Created: 2021-03-18 20:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 388d8c3aca115c2f6535af79e5b45d94 SHA-1: b09422ae832733d3be734532f62f98901c41dba3 SHA-256: 6eb13133b00df44e44f129cbb9428ce81d30e8e49d42fcc968cd61967daffe90
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of embedded URLs and the structure of the PDF indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=flowermate+v5.0s+pro PDF link annotation
    • https://mazofowi.weebly.com/uploads/1/3/4/3/134312703/revarido.pdfIn PDF document text
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/8662320.pdfIn PDF document text
    • https://zitavuzan.weebly.com/uploads/1/3/1/3/131379524/detaw.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/cavatine_saint_saens_trombone.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/lelisidomumegaxawe.pdfIn PDF document text
    • http://pimavegi.22web.org/antartida_light_font_free.pdfIn PDF document text
    • http://kataeta.club/32189716651p81qw.pdfIn PDF document text
    • https://fosutojeki.weebly.com/uploads/1/3/4/3/134330175/vakepefiloki-muril.pdfIn PDF document text
    • https://duzezefoge.weebly.com/uploads/1/3/1/4/131437668/53030.pdfIn PDF document text
    • http://thiswaytovogue.com/80543300338f1ovf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_f818cf47c81f45fba7554b4acaca7f7c.pdf?index=trueIn PDF document text
    • http://dovabaz.epizy.com/assessment_centre_group_exercise_ideas.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_60ef4f7d88c94f80b0627f0fd10c9ace.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/pofanamibujasavozebuvanom.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/kikosasanelujufovuvezap.pdfIn PDF document text
    • http://kekugutepige.rf.gd/act_workkeys_results.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/how_to_fix_a_jammed_staple_gun.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/ansar_vdp_job_application_form.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_c44839ae123b45ce8adb6539ad5f9d1c.pdf?index=trueIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/somijefad.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_0ca8bf36fc064b99bfbb2fa24a37d480.pdf?index=trueIn PDF document text
    • http://pupagerirawax.myartsonline.com/vsepr_theory_in_detail.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_fc5e0bff15eb45549bebef643bd4674e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/acrylic_sheet_colors_chart.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_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 5368 bytes
SHA-256: 74f12a8deaedd4a92439c1523cb89366640c359dca73fd0cab9a0110805a7865
font_01_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 11804 bytes
SHA-256: d2e0ff51c3a3695f672348bc24b3f5bcdf9af8347b0e393c78b0f5cdf2314fdb