Malicious PDF — malware analysis report

Static analysis result for SHA-256 3825deeb3f6f5b4d…

MALICIOUS

PDF

82.0 KB Created: 2021-02-25 10:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8c5a02b8e5502f096e86b4c318370e7 SHA-1: 00d569aad1bb7cfc3b0b51a671436c7a5d33d357 SHA-256: 3825deeb3f6f5b4d1044c39d4751b0297afd584dd2066c93d630176538c74da8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to legal problem solutions, aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/wb?keyword=hess%20law%20solved%20problems%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6035dd4906f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_6034295bb2e70.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/94626778090.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/11538176891.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/ford_mustang_shelby_gt500_price_in_south_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_60217dd53ceac.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/papapozabukuja.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/kovilowab/browning_a5_serial_number_on_barrel.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/57729133244.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/xokolitoseremijexe.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/gst_tax_percentage_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/how_to_learn_epic_program.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vmware_partner_portal.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/dosop.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/jamaica_occupational_health_and_safety_act.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/aol_instant_messenger_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/dosavaxobavikuni.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/anydesk_for_windows_server_2003.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 5440 bytes
SHA-256: f6625e3b03be141ad939b9efd021cccf161069286136a8181ea8420ed8e1562e
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 11080 bytes
SHA-256: cf6938cc4fe34fe93ffd653def5aa5985ad4c5f9a1d3e7a8607c9c81a43c36f3
font_02_sfnt_off000125d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D5 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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