Malicious PDF — malware analysis report

Static analysis result for SHA-256 d541e7e6dabce0e5…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 13:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a7914899a7f964969e449f4b10f1e759 SHA-1: 455930e3a9c02affc7ca047aee4c89502968ff05 SHA-256: d541e7e6dabce0e59b87c4c7b36f2cd8054f010c4978c2d7d89f2ccec8a6dc7e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains keywords related to search queries, suggesting a phishing or scam lure. The presence of numerous external URIs, many pointing to disposable domains, further supports this, as they likely host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://botokaw.ru/strik?utm_term=troy+bilt+weed+eater+starting+problems PDF link annotation
    • https://cdn.sqhk.co/givikofuf/hbLjeew/vavema.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/40148749903.pdfIn PDF document text
    • http://afracheat4.xyz/504145019450k7fp.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/4396845227.pdfIn PDF document text
    • http://stonersfranchise.com/26237263410wqd9s.pdfIn PDF document text
    • http://wimedibateguj.22web.org/buwipepenuvalig.pdfIn PDF document text
    • http://sberin.xyz/79617894380ku3ut.pdfIn PDF document text
    • http://bofesota.66ghz.com/naseeb_amitabh_bachchan_video_song.pdfIn PDF document text
    • http://chambrely.xyz/46559144034g5p3a.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/gemivademuzibavixuzuvu8xo5d.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/tpjd9jc/20064686031.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/non_technical_presentation_topics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewivifonawati.epizy.com/bezidifonajuwowobito.pdfIn PDF document text
    • http://jufosuliz.epizy.com/apexbio_glucosure_ht_user_manual.pdfIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_1c22f0ca93234fad99af29422949b43f.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_ceb15f058baa4a7a9176c996eb1e004a.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_ee640c5394b748999f384a8a7dc58780.pdf?index=trueIn PDF document text
    • http://begosene.epizy.com/mifitimuvixakobuwiterarad.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/jayces_navy_interstellar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4877a8e6-e980-4e91-959b-229839ff9a63/how_to_draw_pokemon_easy_book.pdfIn PDF document text
    • http://vibirokudod.myartsonline.com/classifying_angles_and_triangles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d339b472-7efa-4c21-b081-5d880a7b5332/52285696661.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_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 5560 bytes
SHA-256: f4f712221ce7ead29d045b23cf3c2f30258155fb9f13890b8b8b87762ef0b61f
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 9996 bytes
SHA-256: 73e6a3da294dbaae6f32a2bb9b6b2763e31de2512c065e545c13a59a08fcffee

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