Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e2f9d7ddf1d83f…

MALICIOUS

PDF

67.1 KB Created: 2020-12-21 02:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dd5851353441a53027ebe2db35eb2059 SHA-1: 92c0bda650eeb6e835239fe94fda7f9d7b84405a SHA-256: 59e2f9d7ddf1d83f2a59b9c4e18676fea2cdae8be11f1388c436f658468317d6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=ou+football+schedule+2020+televised PDF link annotation
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/vileganama.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/5fc6a55211f6a41984adb0b4/t/5fd119e3300a2d1a7a1396bb/1607539173223/dragon_isles_world_of_warcraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fba27dd-1c29-4287-a371-1d3e012405f9/78428541874.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/59193569257.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/dojovoxibudubifemorese.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/bluetooth_for_laptop_hp_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dabec6d96458363b5a9a/t/5fcbac851880ce05e84fc3d6/1607183493779/97484266613.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc11f034e98326c023823b4/1606491911138/nonfiction_graphic_organizer_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/february_2018_calendar_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/friendly_letter_template_first_grade.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_off0000c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 5512 bytes
SHA-256: 75e1e237374b8428cfedf4d20bb79af7234bec5ce1ffe4d8ea0b94e179f03333
font_01_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 11108 bytes
SHA-256: e845d47f740c74219035460f5f09937b7bfb1232d84b66a922916cafe0122fce