Malicious PDF — malware analysis report

Static analysis result for SHA-256 7285e0a2b31bb4aa…

MALICIOUS

PDF

66.8 KB Created: 2020-11-21 20:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: be0cfc03c67e780ef90c8b57a7da0651 SHA-1: cf098f2d707cac2086eb9cfdc3c95fc505b035c4 SHA-256: 7285e0a2b31bb4aad1b8865bc6476d8d7f9c04d550ffdc816c62fe9aa358f110
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=rebelution+courage+to+grow+album++zip In PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/zomamima-semamopitobelaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5fb501d2b999d.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/e2ceb8ec53.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/2f1eb82a6.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/5850595.pdfIn PDF document text
    • https://natemavobu.weebly.com/uploads/1/3/4/3/134349428/1655305.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/5e9ca1a815f7916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425784/normal_5f99bbd727f29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/fpu_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b1ecb-5621-49f4-bd76-cfa1a13e3c47/37327063808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4f066b-6756-41af-98c6-a8a3b70a1fcb/sinetenuzuxexire.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/93409036749.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_off0000c387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC387 5364 bytes
SHA-256: f6aaba23c6bf373d58b8792c88aae8844ed4e0769daa7e69d0a83ef5dc8a6641
font_01_sfnt_off0000d5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D0 12012 bytes
SHA-256: d3d08ed67e7f8b45a8ccb032c37d75b941590ca01487adb2a84236de8ed99099

Open this report in the interactive analyzer, or submit your own file for analysis.