Malicious PDF — malware analysis report

Static analysis result for SHA-256 c826e5f4230e7050…

MALICIOUS

PDF

75.6 KB Created: 2021-04-14 18:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71c4a1f9b1470116c95fa3fb8cb5d9ea SHA-1: 534407a160542e296590516602bea04ab979f465 SHA-256: c826e5f4230e705007447aac3c745e17964915f7bc29e10a2d9c9b138c1b84ca
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://bologen.ru/strik?utm_term=how+to+access+my+cloud+ex2+ultra PDF link annotation
    • http://pusewuvi.medianewsonline.com/dabawenilunevavukaxipo.pdfIn PDF document text
    • http://prodive.su/livegedad9kvzx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fec23a3202e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480884/normal_5ffce3c4e27f8.pdfIn PDF document text
    • http://tublitalia.space/69812232863bwe5i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_6045bfaac41a2.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/kufaporusapejalawodawowem.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/83684331002.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/dalava/sas_enterprise_guide_8.2_scheduler.pdfIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/debafoxasosipedozisa.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/skyrim_se_best_combat_mods_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/44235004606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469f0971-c8d3-4bed-8913-3ac70f1b891e/what_can_you_do_for_a_callus_on_your_toe.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/24734850059.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/farmer_boy_ag_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f5ec79-079d-40e4-b45e-c47340491ef4/8327664915.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/tri-_fold_brochure_layout_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/is_it_legal_to_sell_homemade_food_in_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/academic_vocabulary_for_ielts.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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 5440 bytes
SHA-256: 3ddd043f9bfe20238704478b84cbf649480d15e16cfb9ce76db8e70d3aa16539
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 11416 bytes
SHA-256: a7d7423b5eaa1b81aeeba665f7035159cb38c2109dabb7525f1125824a6b1163

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