Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ef40df450a9195…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 17:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4ad68fb1e4acccb7c51a2f8920f5f9d6 SHA-1: 4315d9940cc3e3a8a52a1a01c85f233a234f38a3 SHA-256: f0ef40df450a91951b339b203d553025654147566aa6d05cab9578870181d66d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be related to 'definition of personality development pdf', which is likely a lure to disguise the malicious intent of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=definition+of+personality+development+pdf PDF link annotation
    • https://cdn.sqhk.co/noxisoture/j6hjpih/32245025322.pdfIn PDF document text
    • http://renoxarogiguke.iblogger.org/58279740396.pdfIn PDF document text
    • https://fanesorugetefex.weebly.com/uploads/1/3/1/3/131383934/a4bf3398f9.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/ijughgh/71432359977.pdfIn PDF document text
    • http://leree6.club/gdpr_photography_consent_form_template_freeipyug.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/likuton_binajopifidawif.pdfIn PDF document text
    • http://tryraisins.club/amar_o_depender_walter_riso_resumenurq94.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/ebFVvjh/zombie_shooter_games_play_online.pdfIn PDF document text
    • https://vajilitoseg.weebly.com/uploads/1/3/1/4/131437648/037aaf517e03.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/tzhdjhC/crossing_the_chasm_summary_by_chapter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21c7a7f-115d-4c66-ac84-0d142012589e/is_there_another_word_for_stressed_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50765cc-b963-4438-9bcd-12544bbbdea2/lavudexodisobebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c4af3d-8681-4c92-966f-37e9e39938d0/74556455429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287f90e1-7d63-434f-95ff-8231c9aa3797/public_speaking_skills_for_students.pdfIn PDF document text
    • http://junopufobapepax.rf.gd/marshall_valvestate_2000_avt_150_review.pdfIn PDF document text
    • http://fodunimuka.epizy.com/free_baby_girl_announcement_photoshop_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c73d81a-abe6-46e9-873f-209dbb6c09fc/tezizalum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a4c9ca-9651-46db-9c58-5403a6d0ee8c/how_do_i_fix_my_canon_scanner_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29575bcd-aa8b-4a7e-bcaf-2cd52242579a/25817148830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a8a524-90da-4b36-847b-4e913c2b590d/vogafisegidodowebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c6c6ac-e027-4c76-8ebf-e4d01d41ac69/pejepunele.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_off0000f82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 5348 bytes
SHA-256: 17c605a8ee7df6e7023e5a0f160b73353d5ff65b0677358ed96ede424b932af1
font_01_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 11208 bytes
SHA-256: 89c187cdfdbcb3cedc6882fee4dec2dd017692d787fb60761148a1bc8ff3918d