Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eec26aa1a6416a9…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 19:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a071b7026052f96c9bb4fbc110c57231 SHA-1: dae7c799155c2b3c111888d13049d26438d072c4 SHA-256: 5eec26aa1a6416a9b561101bfe5493d8e89ef9f0cb3c12b3ebd42dda381e00fe
186 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 hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://vilenefex.ru/award?keyword=panasonic+landline+phone+canada', are likely used to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=panasonic+landline+phone+canada PDF link annotation
    • https://gizizajavime.weebly.com/uploads/1/3/2/6/132695742/zogadalunurotebepuve.pdfIn PDF document text
    • http://noverst.xyz/601865946281oe4s.pdfIn PDF document text
    • https://xesamubi.weebly.com/uploads/1/3/4/0/134095888/925af5b97654.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/bipivetiz.pdfIn PDF document text
    • http://cosmeteca.com/56398336933uy9s7.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/a97d7f84c84bb56.pdfIn PDF document text
    • http://bestsaleshopin.xyz/zakagirari02jk.pdfIn PDF document text
    • https://bibuzutevokad.weebly.com/uploads/1/3/4/6/134634257/2a30d.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/bc05e.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/wosejovow_ridif_pawodube_wigipo.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/3504850.pdfIn PDF document text
    • http://itclick.info/opera_browser_terbaru_offline3mrt1.pdfIn PDF document text
    • http://itclick.pro/gimoxeminukitu0hsy9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujewutaze.epizy.com/how_do_i_reset_my_schlage_door_lock.pdfIn PDF document text
    • http://lodufuvu.epizy.com/android_ndk_sample_method.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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 5064 bytes
SHA-256: ea237100d696735ffd44a865539c5877a9901bfddbf26f48577dea956716a8e2
font_01_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10760 bytes
SHA-256: 347f667367351ce2554efa0d0df53cab2215bca6ce004bf6a90ec98b73e37c8c

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