Malicious PDF — malware analysis report

Static analysis result for SHA-256 1479e261622394df…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 20:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 937676f52f75b2b56469ffe55b016375 SHA-1: 2a5dd15ff0b0c406eb85f7576e034dd5c8e54883 SHA-256: 1479e261622394df6a411721bea90c936a7bb866ff64387abee3c5476fd878a6
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, many of which are dynamically generated, indicating a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to various external PDF files, suggesting a multi-stage download or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wb?keyword=ford%20mustang%20for%20sale%20craigslist%20san%20diego PDF link annotation
    • https://cdn.sqhk.co/tenalewi/Rkhghaj/tomb_raider_movie_2001_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ffa14d66df3f.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/636907c2a2.pdfIn PDF document text
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/1089651.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/jialGjb/stack_balloons_solidworks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384820/normal_5fcaf3d92a17f.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/1500079.pdfIn PDF document text
    • https://cdn.sqhk.co/suvezadamut/Xjc4u6M/63106641815.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/jcYa2gf/political_asylum_news_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/OhhEjd9/94780508570.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/675e05.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/hpjsUhc/wipewu.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/woroluwefonezapufosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_6031612d45276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_602d3e35ce97e.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/fVShehi/86201599130.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/ji2jfig/99398744988.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/jarirotexab/25028546542.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/someone_anyone_everyone_no_one_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/bojoxagafizoxupi.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/can_t_see_available_for_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/wallpaper_hd_hindu_god.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/deviwowunitanagi.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/foniluf.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/akhiyan_punjabi_video_song_free.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_off0000db2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2F 5296 bytes
SHA-256: d2d442fd8301e1337b566a71975f5bfd88cad15d493057c861dc620f70b75f7f
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 11532 bytes
SHA-256: c1588e1e7a8a612b74651efd985b7166e86bf362d874ea6c6020d5e1b25d1e13

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