Malicious PDF — malware analysis report

Static analysis result for SHA-256 05695c3d65656436…

MALICIOUS

PDF

93.2 KB Created: 2020-12-14 09:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7da4ff0a32edb27dc89b9896fd956179 SHA-1: fa26c5a2c8f57120d3ea7cd37a1843267529c11c SHA-256: 05695c3d656564369eb7f642d0357d37f0e29f79a935cca78fe9f3965668e062
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://trafftec.ru/aws?utm_term=american+gods+neil+gaiman+pdf+ita', is suspicious and likely part of the malicious infrastructure. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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/aws?utm_term=american+gods+neil+gaiman+pdf+ita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fa49b2661c37.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/lobefedewazami-pogizuwonubo-garuwa.pdfIn PDF document text
    • https://lizitizesibegip.weebly.com/uploads/1/3/4/6/134685526/xonujof_timasugenu_femopidozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_5f9772c121336.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/wejodijam.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/nenokixosi-pazefasufekige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1773ccb-1fa5-497e-a977-7a4a133cb5f3/manual_high_school_peoria_il.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/datenstrukturen_und_algorithmen_gting.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/74850745932.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/comedian_s_guide_to_survival_soundtrack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5947bc6d964583641de38/t/5fd6047396ed101a3e361266/1607861364055/74835905023.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/97532448216.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 3468 bytes
SHA-256: 6e5202dda361dc0e909218abfe2067883b843e5b690a52592161dfcaf66f1401
font_01_sfnt_off0001151f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 5464 bytes
SHA-256: 33b862974378bbba2fa1efe9ef511f8c0b8d394b43dbc5c6f9ddd51fe5348977
font_02_sfnt_off00012794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 5972 bytes
SHA-256: a920ea5b145bad95e06e8271358ff4429553896df49a3b405b982d495000f89f
font_03_sfnt_off000136d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D5 15844 bytes
SHA-256: cf40eb702b24ff7b0880ccae2449e07156aa7b5ea392d4566cc477d5e5741405

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