Malicious PDF — malware analysis report

Static analysis result for SHA-256 feefdeab7c193b73…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 03:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 019a8fbc1abf8642b69ef66ac7722ca3 SHA-1: 5f1f75d149d8dfcf8611278d7b3e300be08993ef SHA-256: feefdeab7c193b738080b71c3ff09f9b07161b0f8d47a402a9531591b5a10310
126 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. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure to external malicious sites.

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
  • 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://mezovuduw.ru/award?keyword=best+micro+cut+shredder+2020 PDF link annotation
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/zobibif-rarazizodejoka-fuvigojelotata-sawobud.pdfIn PDF document text
    • http://requiredjokblog.com/literatura_universal_libros3vh3j.pdfIn PDF document text
    • http://moscow-siberian-force.online/the_missing_link_movie_2018_trailers68yd.pdfIn PDF document text
    • https://miwimuwal.weebly.com/uploads/1/3/0/7/130775744/652b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_6032b5b3ad784.pdfIn PDF document text
    • http://opendouche.xyz/65904168865za4f6.pdfIn PDF document text
    • http://winoorama.space/adobe_photoshop_elements_14cbjsl.pdfIn PDF document text
    • http://instasurprise.online/a_borboleta_azul_livroys0n6.pdfIn PDF document text
    • http://testersairf.xyz/samsung_s5_bootloader_status_check_apk8y5wq.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/9666699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_603267e4125ba.pdfIn PDF document text
    • http://classicalnaturally.com/94661924040rec2h.pdfIn PDF document text
    • http://begemotiks.space/82479585611ti68c.pdfIn PDF document text
    • http://urologo.store/in_praise_of_shadows_analysistktj7.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/b2415aff7000.pdfIn PDF document text
    • http://knitfqph.site/best_wallpapers_2020_iphonep86r5.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/vazisi/chinedum_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/moduraje.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_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 5260 bytes
SHA-256: 9806f62aab2f292892536c2274eaafb31e2eb606ca936c5e64d914cc65ff567c
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 10780 bytes
SHA-256: 757a4e57feb0d39b54677ca37bf567300042cba2904f49f64ef7976b351d9656

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