Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ccc1f8f095452b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-13 21:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 82980ba2c668b2efbe16167c11790a9f SHA-1: a4cf0ce5988bdb19752e46021ca419b4d6567943 SHA-256: d8ccc1f8f095452bbcf6dd77b0337f0254ef1351e75e353019c24fcb3762ef81
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external links, many of which point to disposable hosting and are likely intended to redirect users to malicious content or phishing sites. The document body, though partially corrupted, suggests a lure related to 'Osha 10 hour certification lookup' to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=osha+10+hour+certification+lookup PDF link annotation
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/kuzex.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/ggihchi/46367428340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_6019e1c6418a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_603374c352366.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/cibil_report_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_5fd8c3428b332.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/bCchf56/fantasy_forest_true_love.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/jeieYUk/fresado_por_haz_de_iones.pdfIn PDF document text
    • https://wimofitadaxota.weebly.com/uploads/1/3/4/3/134362004/d57902994a.pdfIn PDF document text
    • https://lisufijefe.weebly.com/uploads/1/3/2/7/132740260/9896828.pdfIn PDF document text
    • https://vomefamatufovo.weebly.com/uploads/1/3/4/3/134378522/cc52d4dea8ac02.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ieVgchf/musica_italiana_famosa_nel_mondo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodokeb.epizy.com/essays_of_warren_buffett_latest_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b32653-ec40-4ed7-b66b-0b00fac0051f/high_on_arrival_mackenzie_phillips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edc867f-e483-4b83-aed1-71e00e19facd/sims_3_sunset_valley_remodel.pdfIn PDF document text
    • http://muropep.epizy.com/spiderman_meme_template_glasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99efdfab-b409-4127-81f3-a22f0c722f3e/what_is_the_definition_of_narrative_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1354706-5719-403b-ad52-497ce2b2f616/samsung_ecobubble_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e3d270-3f92-4254-b6f8-92f1e8252222/physioex_9.0_exercise_4_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7263f2-3e88-42f7-b041-a43fcd596333/27673019091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fc679a-a487-4188-9eb8-f450f191d5ee/whirlpool_duet_sport_washer_maintenance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4827120-e9f2-4826-b47f-9a06b592670f/is_there_a_new_jack_reacher_book_coming_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067244be-d6b1-440d-922f-3ac3f6832cf8/jodinalale.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_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5388 bytes
SHA-256: 67dd26e731bd18188a092ef2609629c79a6f07dcca36fe78c7d961ced70f901f
font_01_sfnt_off0000f77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 11384 bytes
SHA-256: 07e869d27f3855597e2470e298486702f6def1b8ac5ce49d9aa43d26bfd52351