Malicious PDF — malware analysis report

Static analysis result for SHA-256 24663f1e85787449…

MALICIOUS

PDF

78.8 KB Created: 2020-12-14 23:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08b9d6d8769f1c9dcfcd7e3efa596c30 SHA-1: d3afa6243cab6adcd969fa31fb737be9ccd56f87 SHA-256: 24663f1e85787449790b000a2e462ca649245df46fa8c43417ce4d8fcde29041
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious sites. The presence of a known malicious redirector URL and a high ML classifier score further indicate malicious intent. The document's structure and embedded links suggest it is designed to trick users into visiting external sites, likely for phishing or malware distribution.

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/123?utm_term=stalker+call+of+misery+addons In PDF document text
    • https://satotujum.weebly.com/uploads/1/3/4/3/134308249/318332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fc8f966255eb.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/0d3488b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f9cfcb55431f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f8dc1deb4f54.pdfIn PDF document text
    • https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/4031163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f8fea5a47d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408479/normal_5faf17565016e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fa1e580143e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcdefbf56a976706ec3f3b3/t/5fd5f3d0491a58544a0593d6/1607857112607/61110253883.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78c4d8651a047519888c5/t/5fd60bcb481cfa31adbddddf/1607863244148/digoxewenegunizepojo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc520b37848ba205d341ec0/t/5fcd3bf474a40730fba4e03d/1607285750427/planet_fitness_promo_code_aug_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7c970c-5624-4134-8d3e-8e0f276a85af/41323349537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a3bc75-15a0-4fd1-9e55-4bfc31fa8a87/ronidapeladapofebuxiwo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64dc7bd14ff0dd2c15434/t/5fcfa83a68c18617d41b9077/1607444538421/daxugijofuzalovagugezuju.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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 5436 bytes
SHA-256: f2efac9349440447d8b4f1305592766e2cf3d4957ea6b2a6c49e49d511606b0e
font_01_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 10436 bytes
SHA-256: 25a5ef2964097de21656de0e9556161f70f7fffe5b5e97f6208261e20428363a

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