Malicious PDF — malware analysis report

Static analysis result for SHA-256 472bfc0e41a22e17…

MALICIOUS

PDF

92.3 KB Created: 2021-01-06 11:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 164d079d008921f394cf55bccfb5b091 SHA-1: 4329162cb1eee52618f36a12793ef988c012e428 SHA-256: 472bfc0e41a22e17bc8b416b1b50c0396a9fafd9d9f74afe1d0f8ad3d357b9c2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

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 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.
  • 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://trafftec.ru/aws?utm_term=arizona+cardinals+new+uniforms+2019 PDF link annotation
    • https://xujuwole.weebly.com/uploads/1/3/4/3/134378666/pozororivogiwojegu.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/ejifD27/download_lagu_bubble_pop_hyuna_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/godanalumado/tjjoxqJ/world_factbook_cia_gdp.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/ggFfhfT/munawobaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/WzYrjfQ/wood_craft_supplies_near_me.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/1827908.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/7E7IgfI/download_flight_pilot_simulator_3d_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/ejbjcjj/minecraft_mini_games_bedrock.pdfIn PDF document text
    • https://kifitakuridugiv.weebly.com/uploads/1/3/4/7/134770331/5619777.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/jejulurowev/6015237721.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/hair_style_cutting_photos.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_off000129da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DA 5780 bytes
SHA-256: 0082a42620f1815ff618a70263e6e800f1dce457ea312c9fe3daf362b919d748
font_01_sfnt_off00013d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 11672 bytes
SHA-256: e27ec22c35abc622c557a0ff92aa14f7e8caafd44ee1c8ac36b42e746783f0c8