Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13d82ba361bc05b…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 22:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 44b149dc7d54cbb7683ad5bc86596eb9 SHA-1: 298319cfdbe50d872188979bbdffac4ae46ea298 SHA-256: d13d82ba361bc05bf692c9dd12380d34a486f70c166220ffe6ae7623c02bd727
94 Risk Score

Malware Insights

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

The PDF contains a link to the URL https://cctraff.ru/strik?keyword=municipal+lien+search+california, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to trick the user into visiting a malicious site, likely for phishing or to download further malware. No scripts were extracted, but the presence of a malicious link is a strong indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=municipal+lien+search+california In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f873094a03a2.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/xexolov_texutob_parasorere_vadeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5f9c3994b3d14.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/gawowubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f883c4bd3861.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/29771ff7-96f4-48db-8386-7044197ed043/82651577616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6262335d-8fe4-420d-ad9b-771e3f6e1605/pawuxozaberigekipapabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1eaa49-0a2c-44fb-a4a2-faa0b5c66ad2/68526621634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6faae99d-979b-4807-908d-dcebfe137c1c/vox_ad50vt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/minecraft_witchery_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d52ee32-3580-4d47-9df7-75965dc19fdd/lalebamukiliramo.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/fofowavomiroga.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/wutaze.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/school_teaching_experience_certificate_sample.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_off00006280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 5108 bytes
SHA-256: a809cfcf066bd86eefc6575d96bbfb2e4d9df6834e504e22de588e4ba5b1a599
font_01_sfnt_off000073e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 10720 bytes
SHA-256: a5fc7873a9d5499601e26d94a3b6a3a3ccef1b7c34a01a5eaeb65c19e6482367

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