Malicious PDF — malware analysis report

Static analysis result for SHA-256 e877fa8821c37c11…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 02:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a0e975aede4ed2324fa5aaacc58edcad SHA-1: ad8fb190d41d53228990815b16a95b0467d8b6ce SHA-256: e877fa8821c37c11ba5f2c267ed3db7714ef873b53c834cc4d68f017ebf3eb33
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm for SEO manipulation or to distribute further malicious content. The embedded URLs point to various disposable domains and hosting services, characteristic of phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=nombre+de+las+partes+internas+de+una+computadora PDF link annotation
    • https://wojopukutipu.weebly.com/uploads/1/3/4/3/134345686/de3cfc24e0a3.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/hdiingd/lobarifufek.pdfIn PDF document text
    • http://makedctl.site/lomuvumumusimuw66t7e.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/3hGDJje/zombie_apocalypse_a_zombie_warning.pdfIn PDF document text
    • https://cdn.sqhk.co/ninevowa/jhiduqJ/free_movies_2020_app_pc.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/dateru.pdfIn PDF document text
    • http://dream-stat.ru/ninja_professional_blender_1000w_bl610_replacement_pitchers0l0d.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/3b90abccc0ab4.pdfIn PDF document text
    • https://cdn.sqhk.co/nafolekuge/d2hitjf/cowboy_goodbye_song.pdfIn PDF document text
    • https://cdn.sqhk.co/tenerinirik/hqfgdgi/jobiwuninajumales.pdfIn PDF document text
    • http://gratoraama.website/981427707387tq9i.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/ngdTjj3/siwinapareduwimaz.pdfIn PDF document text
    • http://ouily.xyz/12236858780u4r1w.pdfIn PDF document text
    • https://cdn.sqhk.co/kidobogi/EjgBgdf/lotirumowivekelo.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/8c18a56e-a974-451b-9d95-1bb7f1e25495/the_other_side_lyrics_jason_derulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557d6374-8be6-432e-bcd9-aa3596ebdb2d/how_to_create_a_website_with_wordpress.org.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/76348855765.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/48425185147.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/60794160377.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_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 5328 bytes
SHA-256: cab9191c3bd47baad2d94b4c2e25c08f6cf1859d66075bc5aa5498cdeee0d04d
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 11592 bytes
SHA-256: 24ca3a28276c759814812bd0a1f5acc99b9fbc2289c478c0d6b4913b5a297b99

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