Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb3e65ceec81204…

MALICIOUS

PDF

74.8 KB Created: 2021-04-08 12:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b022c3a4311398161507b0ebcd04372e SHA-1: 525c6746880e236f4186359dd78f098be813c02e SHA-256: 5eb3e65ceec81204306c61f0e3b33088785405b6aa6df7dd905a5d68a8b7b435
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ponafet.ru/strik?utm_term=imax+b6ac+lipo+connection+break PDF link annotation
    • http://kunujunekedi.mygamesonline.org/business_turnaround_strategy_steps.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/supply_chain_management_free_download.pdfIn PDF document text
    • http://bosaboro.22web.org/attahiyat_surah_in_telugu.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/how_to_write_a_letter_of_recommendation_for_a_student_from_a_teacher.pdfIn PDF document text
    • http://pafewubeb.iblogger.org/worthy_is_the_lamb_hillsong.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/what_is_chemistry_like_in_high_school.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7322f44d-5cb7-45f5-8521-a79093f6ce74.filesusr.com/ugd/dd0890_54051f84869949ea815a468859d9a1e4.pdf?index=trueIn PDF document text
    • http://firasijekebov.rf.gd/13585965174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0d0c2f-87c1-481f-886b-3e8c10bb997a/molecular_cloning_a_laboratory_manual_3rd_edition.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_58a90b8d4b344907a93c5fc34d690d38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1ab141-6980-4af7-a496-4e462f728a0f/sagemcom_fast_5260_range_extender.pdfIn PDF document text
    • http://rugizasuvodaw.rf.gd/46896446206.pdfIn PDF document text
    • http://didevuxuwodur.rf.gd/57309089499.pdfIn PDF document text
    • https://722d0b64-886f-48d6-ad1d-3f240095bb95.filesusr.com/ugd/07f6b3_75cebb5e33da4363988df761ef802a43.pdf?index=trueIn PDF document text
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_00552323f77b466c9049771fb7463610.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f787ba-1f03-4756-953b-a27d4f53d21d/geximaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241f9fe5-50f2-4460-af42-5dfccd4238f5/acu-rite_165_indoor_outdoor_wireless_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2b3ddf-5e50-4e70-a126-cadaea382bf2/does_vitamix_ever_have_sales.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5264 bytes
SHA-256: 4ee7c0c69011b22617e8c3640b0250a19af2d721d5609c3166c86d438b132c16
font_01_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 11160 bytes
SHA-256: 8e738ce92e27783c2788d29d456c6d6986b66d4f21aff5b690dfdcea3fe08b7b

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