Malicious PDF — malware analysis report

Static analysis result for SHA-256 364e7398bedb07ca…

MALICIOUS

PDF

70.5 KB Created: 2021-01-11 11:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f71e0a3ce0a87dabbba47c2a2eb55e28 SHA-1: f618ffec8f1c18b79010b0258cdae6a0717ca798 SHA-256: 364e7398bedb07ca5b2b5e27c94d8ec3c9bdceb74c692eb26a8d05393e9f9930
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'Clipboard command execution lure' heuristic indicates the document may also attempt to trick users into executing commands, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=cuneiform+ocr+portable In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f93aba726e98.pdfIn PDF document text
    • https://fuxamuwilemodo.weebly.com/uploads/1/3/4/4/134478429/3676547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fd3b842db761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366371/normal_5ffa4bf222a1b.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/1566151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fc262fc01aae.pdfIn PDF document text
    • https://site-1173857.mozfiles.com/files/1173857/cafe_racer_bikes_for_sale_colorado.pdfIn PDF document text
    • https://site-1168354.mozfiles.com/files/1168354/megimapavekibamub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_5f9b1b8f9e293.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/deriwakak_pasumux_niwatuzekalobev.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/defipedibe/14899406402.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/lifegear_inversion_table_75112_manual.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_off0000d62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 5028 bytes
SHA-256: 0364ba7428f0f94d066a8cd0b32f950b9b0c03426954db1766644e1ab735b976
font_01_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 11664 bytes
SHA-256: d0365ae1296867fc9e31111566802663fab11e89526a578b161e6dcdb2ded0bf

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