Malicious PDF — malware analysis report

Static analysis result for SHA-256 682a582a1adde3a1…

MALICIOUS

PDF

72.9 KB Created: 2020-12-16 01:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 74cc7e63c65be1281988c20ef91c1a12 SHA-1: c1d24cbdc2ce34074031d0f78e7a695bf73d1f2d SHA-256: 682a582a1adde3a15f7396badccfa139f57ef431ecf0c0f798839497509d4de0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=how+to+add+levels+in+revit+2017'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the PDF content suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=how+to+add+levels+in+revit+2017 In 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/e699ffac-b645-4d3f-97af-224bddf2338b/ars_magica_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9c3bbd-12b0-4bca-ae66-8375493d6bf0/pampered_chef_cookie_press.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/election_commission_of_india_results_2019_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc194132cf09257bd70d589/t/5fc32bfdf8cdb769c64af1dd/1606626302274/8599260298.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf66b00f7af3919d2fbd9/1606219371775/sifinesak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86731ff4-574e-41cd-987b-898d0f40c4d7/31177134599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdcd09b-3b33-4334-82eb-48c21f795472/kadoburubiwaz.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/tapizurulefedak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d08a54b-7664-45b6-a148-7d2394bb0d5d/11264788169.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/gigantes_de_acero_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a2fbff13940aa25fd184/t/5fc6b9715060c93fcd652d80/1606859124814/amazing_world_gumball_season_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc052d83dfdd95b60d21819/t/5fc2dc2064571256549b0e99/1606605856456/yahoo_answers_baby_names.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/70934326129.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc550135bcb0228a29fc239/t/5fcb81728dcc5603bef520ae/1607172467117/sepat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1193b5687f52b6b825229/t/5fc4e755f3de5e49b5ff2c56/1606739799540/58916915325.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_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 5336 bytes
SHA-256: a4d932f9280b4e0606c6346cf9a31d32118ca3b17acd7d779a49b30009fd1c72
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 10372 bytes
SHA-256: 033064fb9ef94f2630ee120cccdb37c4aae45bec538630d2956a5cc2499095a9