Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aae3575b8df60d2…

MALICIOUS

PDF

73.9 KB Created: 2021-04-16 23:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c8c851bafc412c5472112c2fe1a20de SHA-1: 8b4224480f73d35226a2707e56753d7f32431cfd SHA-256: 9aae3575b8df60d268cbd1905ea4fc0657e3cf45c998b09deb5c768e02e44d2d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9999

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 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://leonvi.ru/strik?utm_term=can+you+kick+out+a+rent+stabilized+tenant PDF link annotation
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/6acaf.pdfIn PDF document text
    • http://tututot.mygamesonline.org/54419151876.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/architecture_student_portfolio_for_internship.pdfIn PDF document text
    • https://resigigemi.weebly.com/uploads/1/3/5/3/135326159/8296836.pdfIn PDF document text
    • http://zotokes.iblogger.org/47483134927.pdfIn PDF document text
    • http://dreabling.online/54318453350twyv3.pdfIn PDF document text
    • http://thehensleys.org/sonobovoxudipaxusirevaseku7ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5ff08451ac79c.pdfIn PDF document text
    • http://idealicaitalia.website/542302560077spvh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_6048a53129c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_602fde5bcfe2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601ffeb12e362.pdfIn PDF document text
    • https://lazoseroli.weebly.com/uploads/1/3/5/3/135316949/6287245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391015/normal_5ffbe18d5e2f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_60215b9297086.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewaxibazo.epizy.com/33008147265.pdfIn PDF document text
    • http://dapukagizepor.rf.gd/58556610765.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_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 5192 bytes
SHA-256: 247711a8ddb34394e0729b1c42521174d68bca40c13756ae4d43faa35096a4b7
font_01_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 11088 bytes
SHA-256: 667e2a31b9e1a4dff3fa5563258fdefba0163705a539b17d096f01d996470a9f

Open this report in the interactive analyzer, or submit your own file for analysis.