Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f108158530a414…

MALICIOUS

PDF

67.3 KB Created: 2020-11-23 15:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d67d1e9a87a7cfa2af616c0f1586b8d0 SHA-1: bff3ed785ec2ccf62fc836e2278f93b727fcde2e SHA-256: 93f108158530a4140db8a3c54e7109f7143d3f4b7f4a525e46990c087cf86255
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or suspicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=the+visitor+returns+unblocked+games+weebly In PDF document text
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/88c41686e.pdfIn PDF document text
    • https://jazetixi.weebly.com/uploads/1/3/4/4/134494542/9130076.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/fudezudubedulo.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/dusubonifu/52722402352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cabf3b7-1a25-463a-8b79-b910cc12e2ad/what_township_is_exton_pa_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf8259e-3b7d-420b-a16b-e8d19efc5d98/sopetifog.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/sewosax.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/10658742945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b6a13c-d74b-4f29-b07d-b6a87f2525cc/93445358720.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/20780054163.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/cape_falcon_kayak_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5422b5a6-af2f-472e-89ce-f5926d5e5904/guguzi.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_off0000c9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BE 5760 bytes
SHA-256: 8da37b1161bcaf2e4d998363d538d243945fc84f6fd8c4cc020ddf5120fab323
font_01_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 10264 bytes
SHA-256: 1d0f6aa17af8f53abcce9a4b1a204a8658ac34705cea0048f8ce8160a42bcc0c

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