Malicious PDF — malware analysis report

Static analysis result for SHA-256 2647e95746724f03…

MALICIOUS

PDF

88.6 KB Created: 2020-12-06 01:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5e197479a68a78afe920d2ed366dad44 SHA-1: 32d716de1298e5f8de38ce0aced859bb9ff52ed2 SHA-256: 2647e95746724f032a85671c9276618b83f27a95c722fbd93dc8a849d97e37b9
154 Risk Score

Malware Insights

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

The sample was flagged by multiple high-confidence heuristics, including a critical alert for a malicious redirector link and a machine learning classifier. The embedded URL points to known malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and malicious link suggest an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/strik?utm_term=hashimoto%2527s+thyroiditis+diagnosis+icd+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5fb4fb4f07685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f8a2f477dc77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8e3e4ec41dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f9dcc03b8ea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f9449bcdb444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fc33606c6133.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://uploads.strikinglycdn.com/files/eef29db2-975a-41c5-8ee3-855564ba80f2/dasopaxatejuwawasob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2289e0a2-36c4-4b7f-a6d6-0d95b07bdd5d/5th_grade_science_eog_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5644e7-1d9e-4075-8889-d067dcdcd023/supumusunagogojedibel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1ce0ed-bbf7-4262-8da9-4ad6ddbad87d/www.seguro_social_venezolano.gob.ve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2feae01e-83d6-4790-9379-b80b992aba37/evergreen_property_management_nh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510b13a7-4654-4fa1-9221-2483327556fc/59090541968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a33bf7-6071-477d-9221-4054a6798cf7/charter.com_e_mail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107cdbee-1448-46f8-a109-cded453e7776/what_is_the_initial_velocity_of_the.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 5280 bytes
SHA-256: 07e71d0a31ce8b82d15460a3cc5fb1d814192762f3d4e20a7287d7d531d545b8
font_01_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 11728 bytes
SHA-256: f4437c0fcb500d665fc7735d8fd85b562d5103bce8c0ff85f9421ca379245b3e
font_02_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16
font_03_sfnt_off00014627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14627 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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