Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea6544bbf7d63a1…

MALICIOUS

PDF

69.5 KB Created: 2021-01-07 22:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4be78d1079f64ba047aba824991f50f9 SHA-1: d01fea5bdd7d86c6cdd2efb1dde6168afcf78252 SHA-256: 8ea6544bbf7d63a14cc04403d60d36853423efe91d299aa0d8f13c89de0433a2
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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/aws?utm_term=next+curtain+size+guide In PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/kuvejedes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5fed1fe12380f.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/9b70c11d07449ad.pdfIn PDF document text
    • https://xatomurukazaj.weebly.com/uploads/1/3/4/3/134378662/soxafidanutelil-moveduf-repigafonesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f973d5884372.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/xamibudasagas/finekawetosurudonataxu.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/sap_data_services_designer_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/94275676506.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/sonic_all-_stars_racing_transformed_ps3_iso.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_off0000d29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 5164 bytes
SHA-256: 0a2faf486b91f7c265c2d03d9a0634033e87aa392bf4226291a15c184e59b712
font_01_sfnt_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 11012 bytes
SHA-256: 94d0f324e85b93b8e915cb368fcd76a6d8c112499c3126f6bf9cd80a9c2a0356

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