Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d448c38380c9087…

MALICIOUS

PDF

76.6 KB Created: 2020-12-30 19:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2eb47433d1fc542bb4788fd50725cecd SHA-1: 896c3e34d6a441ed78c106b4d5d924e1e0a194ea SHA-256: 2d448c38380c90877afc0921c4fb807c683610bdbdb6676c2bdf2872d39d4ff9
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external websites, indicating a link farm designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute malware or phish users through these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=free+action+movies+2018+full+movie+english+american In PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/5127803.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/9479246.pdfIn PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/wamugipokavizuner.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/fhaajd2/dixosefogelol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5fab8e3b177b7.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/datowigorikededij.pdfIn PDF document text
    • https://zoxobafibo.weebly.com/uploads/1/3/4/2/134235835/d604553db9.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/iapgiid/70760160085.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/jefazaxal/metro_2033_weaponsmith.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/viewsonic_pjd5153_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9559efb1-543c-4ad5-9a40-3e26546de935/70110372754.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/automotive_electronics_handbook_by_robert_bosch_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/android_studio_debugger_not_showing_variables.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/varom.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/88794923947.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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 5832 bytes
SHA-256: f071f06d8e7b79a4628efcf20480b4c3dd7e9b52aa08ce8cea42317d31370541
font_01_sfnt_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 10264 bytes
SHA-256: df79af65a57c46ddfe8347454209a7c6757c79d33ba911bbe143c5e432685872

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