Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60d3f7d08b291ca…

MALICIOUS

PDF

64.1 KB Created: 2021-02-02 01:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f84b69ac0fd535b9a5afd377b011fa01 SHA-1: 5bcd1952d6809b7fcb4c3d466f29d9f2c0820af9 SHA-256: c60d3f7d08b291ca594387b3abc5ec4b1e1479919d1d33a5c18e3ae92b9bc01d
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/123?utm_term=avid+weekly+articles In PDF document text
    • https://tibufidis.weebly.com/uploads/1/3/0/7/130740046/veludetibom.pdfIn PDF document text
    • http://xomaweluk.22web.org/free_purchase_agreement_template.pdfIn PDF document text
    • https://wepifoxo.weebly.com/uploads/1/3/1/4/131437594/765fa574.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/igIYhbS/84923703003.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/dusined/291804072.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/26860304848.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/15522269865.pdfIn PDF document text
    • http://pakafadudu.epizy.com/mikigusoripinojules.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/47440275656.pdfIn PDF document text
    • http://wiwekire.epizy.com/business_development_assistant_job_description_template.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/casual_survival_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/assinatura_digital_online.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/86063892001.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/lapidejemaxegetelomekoni.pdfIn PDF document text
    • http://pamilov.epizy.com/21740900801.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_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 5240 bytes
SHA-256: b93ed18c70383de8d117f9582313b80e65bd41e11fb751b2150b1bef47d7890b
font_01_sfnt_off0000d0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 10404 bytes
SHA-256: 7359c259fb63523a3ce9f2d9e6777026bf8837850e824126722a3c4defb7226a