Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d584375972113b…

MALICIOUS

PDF

64.6 KB Created: 2020-12-20 06:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1d620f642de11346eb3ab1cf990ac66c SHA-1: 7da6009e81fdac19ec3720a09acc0a8811c9d44b SHA-256: e7d584375972113b08652574155e108be9cf0a8b1a090f3055c3d2649cbe8804
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or redirector. The presence of a link to known malicious infrastructure, coupled with a large number of embedded links to external PDFs, suggests an attempt to manipulate search engine results or redirect users to harmful content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://traffine.ru/wb?keyword=video%20tik%20tok%20viral%20bengkok In PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/wabasasi_gotujomuked_tiwiwide_tedar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45fc80e-7d4e-4aa2-b89f-011d8d9001e3/promotora_de_salud_sakura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aad60ef-e118-43b4-ae6e-9f6fbec78e7e/conic_sections_used_in_the_real_world.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51bf8c6d96458363d4b13/t/5fcb5ccb33fb14715cba5883/1607163095495/radio_javan_app_for_android_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b594ec-afa1-4bbb-9fcd-fdf0b2d9fc84/who_pays_corporation_tax_in_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4452b8e5-b4ad-4a63-ac42-c849581ee552/bowflex_ultimate_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/busenakusawona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd24c6d2-62e2-491f-ad9d-8ede274691ef/the_lion_the_witch_and_the_wardrobe_chapters_15-17.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd7159e-6fff-4cad-a94b-bde7da4643f5/15025098156.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf492afa04221c7116684d/1606371627449/bojobuzaxopawonug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f29194c-a5e9-4422-a860-147177d2c796/hope_property_management_coventry.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_off0000c27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27E 5044 bytes
SHA-256: b777bbc41a1a702aba396ec7f33082a6ec6036541d33a7052e93bca9753bb312
font_01_sfnt_off0000d3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C2 10140 bytes
SHA-256: a49c724d131e60de8b400d19843313dec5875f16d03658ccd1af38fbdf17d607

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