Malicious PDF — malware analysis report

Static analysis result for SHA-256 0344834ac9e6ebc8…

MALICIOUS

PDF

73.9 KB Created: 2021-05-19 18:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 90d34e23515fef39053f8f41de862164 SHA-1: 56eacc20796ede6f65912f853f2fb3d3ca7cab94 SHA-256: 0344834ac9e6ebc8f5822a23bd3087763a66d6f62602e3376d82630687196061
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a primary suspicious URL pointing to 'dugedepap.ru'. The document body, though heavily obfuscated, suggests a lure related to network settings, aligning with common phishing pretexts. The presence of many external links also suggests a link farm or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=what+does+network+settings+reset+do PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fc87a8f3ec84.pdfIn PDF document text
    • https://detitominaxa.weebly.com/uploads/1/3/5/3/135304018/nanunijej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_602ce47ce9be8.pdfIn PDF document text
    • https://guxosenenizezov.weebly.com/uploads/1/3/4/5/134598055/6891302.pdfIn PDF document text
    • https://dupopawo.weebly.com/uploads/1/3/4/6/134652833/1490411.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/4ac9c5ec-15b3-4af9-bfa8-c03dc61f04b2/98509798879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb49fd9f-135a-41ba-887b-227244e6d22a/free_indian_vedic_astrology_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782e934e-834f-4d17-8521-364ce8981881/11553003602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdca206a-37ed-41f3-b739-fc7635ccc7a5/nufusabibunafepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3c0d39-5fee-47de-9510-d7600462c389/introduction_to_modern_cryptography_2nd_edition_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/wow_cataclysm_patch_4._3._4_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14dbce1-d413-4819-8ead-b9e11d068005/raror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499d23ff-9cda-43af-a65d-2edf54778497/befovilelejubomad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de4cee4-fbda-416b-9d26-c543c5cd6b46/dell_precision_t7500_motherboard_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27ff6a3-63f0-4e88-ae7f-893b95a3a5bb/environment_impact_assessment_act_2006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d64710-8f30-4ad6-9118-69f36e523d04/73745690965.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/65100615778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003be205-3525-44a7-afba-55b76a88d3e8/tuck_everlasting_worksheets_answers.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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 5224 bytes
SHA-256: 9d466da20718ed3af0e440d09349b9bab139cf070c1ea9aadbf943d616c1cda1
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 11276 bytes
SHA-256: fc5a5329cec247fb1698ccad2232589f04941d38edf3f50de013793497f2413d

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