Malicious PDF — malware analysis report

Static analysis result for SHA-256 22008a102352c2a4…

MALICIOUS

PDF

70.0 KB Created: 2020-12-27 06:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7bce31b4f6969cb066834bcc2ac2694c SHA-1: 1f2140c0b880e4cc5256919478c51b1487f02d5c SHA-256: 22008a102352c2a4a14ad4aa8cd95b5c9aabfe0e01513a500e145a4860dc3eb1
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 and a machine learning classifier. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these malicious links.

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://cctraff.ru/123?utm_term=cancha+de+baloncesto+para+dibujar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5fa2b67cd653f.pdfIn PDF document text
    • https://tefidimigeb.weebly.com/uploads/1/3/4/3/134319466/b49b91fd2492.pdfIn PDF document text
    • https://govodiroruje.weebly.com/uploads/1/3/0/7/130775462/c090c8565f413b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fb29bcef192b.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/modovesibowemoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_5fc25356c2ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5f96301dc7a4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5fc9122b3d396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_5fc0c0b1760ae.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/1342199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f88a23b8aee7.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/felasorarabipis/regevizin.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/free_printable_blank_calendar_templates_2018.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_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 5280 bytes
SHA-256: b70958789995e91f3cc7a45e44b0859bb70f0016ec60fe0eb5721bb0f81a62c1
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10860 bytes
SHA-256: ced60dccab0caa5509bd9cb9e8418756b20d443018a84eed7356a5e7d5371093

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