Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d3945b4f14c15c…

MALICIOUS

PDF

70.7 KB Created: 2020-11-10 10:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 319d7186449534b209a8ec1805210f08 SHA-1: 1b8b930791777386343047da012cf4147d9b81fc SHA-256: 54d3945b4f14c15cf769e1ad4b727100bc65d5f1ea5f6a08b45afc56641a5c8f
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with several pointing to known malicious redirector infrastructure and a large link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO-based traffic redirection. No scripts were extracted, but the presence of many external links suggests an attempt to direct the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?keyword=subaru+power+washer+pump+protector In PDF document text
    • https://bexitapanirid.weebly.com/uploads/1/3/0/9/130969950/momegozizu_wetinetizokop_moveguda.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/5453699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f9b0e6fae7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408720/normal_5f986ccc1c314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f873b1b4b440.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/6e0d65838d805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f8e9181bd316.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/radaruropivoje/xilapezowegu.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/18899669860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5143d807-10b7-4db7-a456-71ed25db5521/conjugation_of_saber_in_present.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3185c9-72bf-435e-ae1b-eac3e026f983/selul.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/chapter_17_to_kill_a_mockingbird.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_off0000d9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 5476 bytes
SHA-256: 9715aa1f5c66ee1a4f51424f05392f873635fe65e4db47b6324331c6dc8e7aff
font_01_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 9832 bytes
SHA-256: 3f7144e7db6a80385745297b2d492a4544d011d71e181f80e7eda40948b202eb

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