Malicious PDF — malware analysis report

Static analysis result for SHA-256 274dd452a9b2cbd7…

MALICIOUS

PDF

90.2 KB Created: 2020-11-19 06:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 13a9c7a2e5d7e87220f1166bbf9579c8 SHA-1: dcdfa028b68b5e618476c6542089577a251b3dab SHA-256: 274dd452a9b2cbd7f3656c58b4bedeafb00e294b28c8029a399fef1abdbbd758
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=my+father+is+strange+netflix In PDF document text
    • https://lazekikobetilof.weebly.com/uploads/1/3/4/4/134443651/f4d693ef1.pdfIn PDF document text
    • https://labisafedowep.weebly.com/uploads/1/3/4/7/134722654/a34b549764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_5faa5fc647b87.pdfIn PDF document text
    • https://pofumojonoro.weebly.com/uploads/1/3/4/4/134474045/2a88298882eb1b4.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/pexejizerupox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fad349b12e47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469143/normal_5fa6707867493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f968c297376f.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/f76e0c13-df21-4e65-a71b-134de553b24c/xorevagefowapufupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a712055-ee70-448e-a9c2-136ce95bb4ac/wind_dryad_summoners_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cdab4d-10fc-4e31-934a-976359243939/97725921100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d3f5c15-0e5f-42a0-9f48-08177d0936cf/sazinolurotijeguviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff0c400-dab9-407f-80b8-78a3a477896d/kezaxajig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fa8708-5453-4ec1-b7b9-2833d908503b/todidirigirupu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 11696 bytes
SHA-256: 19cf10c60902e8ec61b5ecfa8443f142b4abc470c2ae4cf95b0f630e0350dc7b
font_01_sfnt_off0001238d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238D 5204 bytes
SHA-256: fa68038184a3033565c578e368278fc2bde8b122cb221b0193eb49892a463e51
font_02_sfnt_off0001355b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355B 11204 bytes
SHA-256: 0ba553833b5ee2a5b7e81ae365a67bf4a2459e9640f26a1b270d4b9d3ccd2d6e

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