Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eec367ad803f0db…

MALICIOUS

PDF

71.3 KB Created: 2021-03-13 13:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 088c66b23e35a94421275091be960c02 SHA-1: 5a659cdb70487cf9cad9a82472ca4de02ffa5c55 SHA-256: 5eec367ad803f0db733e2962f534341cb733572d06a97de51ff07115594deda0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/123?utm_term=discharge+summary+template+for+mental+health PDF link annotation
    • https://mafatuxaxi.weebly.com/uploads/1/3/1/3/131384293/4700527.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/luxuretibeke.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/1706f4b1.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/1663317.pdfIn PDF document text
    • http://mivetys.xyz/android_cell_phone_data_recovery_spy_stickbsw7i.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/velogamejilej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489050/normal_5fc71e35a25d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5fefa478b6382.pdfIn PDF document text
    • http://vovality.club/wordpress_cms_website_templates_freenb576.pdfIn PDF document text
    • https://lotojenamiz.weebly.com/uploads/1/3/1/3/131381761/vegup.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/busig.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/murunaxokugelelobodotar4f22.pdfIn PDF document text
    • http://medyayazilimtr.com/how_to_write_a_news_report_example23ozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5fdd77463a946.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/406dccc3-9e9d-4851-8802-787c4e4d361d/lopid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5598e616-863e-49e1-a7bc-5f3adc6bf28b/tripletail_fish_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993783ab-1448-436f-a985-de8eed94bb82/39679095103.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 5528 bytes
SHA-256: 522b5ffb6150b74866e0c325f38dd5bbd16a36c60b68d0ddcf7557864ad77730
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 10092 bytes
SHA-256: 1c63017d2ee0e89a9d8c5e773d171202a2353a6ec89335bb8c331de7da2d5ae5

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