Malicious PDF — malware analysis report

Static analysis result for SHA-256 8214feced25b22de…

MALICIOUS

PDF

76.8 KB Created: 2020-12-07 00:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c718e04afbf4c9c99ed6d7a1c4c1a065 SHA-1: daf80cd7dfb93b3a9aa5238f736529006b3a8156 SHA-256: 8214feced25b22de56852373ca5f9cd87aea0e6a5a81e17f59fd3a9864fa2bdd
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=m51+super+sherman In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_5fb2f2aa82870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5fa3196e81484.pdfIn PDF document text
    • https://jusegopij.weebly.com/uploads/1/3/4/4/134480833/lazuzute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fa838d4320ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f9ad4010d9e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5fc467e39cfff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fcb503c97ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8a5f2a17e74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc11a263c02f22b9d346b4f/1606490662646/99127067874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58aea3a-920e-4aae-add4-6f602057c6c4/satitesadava.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc2679f173fb5383bf08923/1606576033098/binomial_distribution_ti_84_plus_silver_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f441ff6e-7709-493d-8663-dafb3f9b2c37/vakin.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_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 4852 bytes
SHA-256: 055213e7813a18f1ac6f91e9290683afd52d70b95b238a02f14aab9e7c3c582a
font_01_sfnt_off0000e86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 15584 bytes
SHA-256: c747e3ca92e3740ea1670235a30898ace6d299f47d640292f2add428afa8dcb9
font_02_sfnt_off00011887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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