Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c31c026e332d2c3…

MALICIOUS

PDF

217.9 KB Created: 2021-03-18 12:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9a35d9c8e4d277d30a13c690ec07d424 SHA-1: fa4c64dbd8f5b4858f3d5c2d7770e9299c842f69 SHA-256: 8c31c026e332d2c3b0f519f68ab5eacc089465c261cf08bf79acfbb3d479164d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. The presence of an external URI pointing to 'ponafet.ru' suggests an attempt to redirect the user to a malicious site. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://ponafet.ru/wix?keyword=mark+1+41+kjv PDF link annotation
    • http://tells.fun/how_to_think_like_successful_leadersoi1cs.pdfIn PDF document text
    • http://usacreditmonitoring.info/78415755117amljx.pdfIn PDF document text
    • http://popularchoice.space/ruruxamuvagimiv59br7.pdfIn PDF document text
    • http://secureappeal.com/nefuxunawejofasanefexiz1n.pdfIn PDF document text
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/2df99.pdfIn PDF document text
    • http://rugitezeko.22web.org/polarity_test_of_transformer.pdfIn PDF document text
    • https://rarifipive.weebly.com/uploads/1/3/4/1/134131304/foselofegoja-xenoj-binoxijofam.pdfIn PDF document text
    • http://dopenukivo.22web.org/high-_end_formal_synonym.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/welanisowari/midinezor.pdfIn PDF document text
    • http://gibivugaxuma.rf.gd/ielts_essay_samples_band_9_download.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/49623410566.pdfIn PDF document text
    • http://sufuzot.epizy.com/mammogram_guidelines_uspstf.pdfIn PDF document text
    • http://lufusemeg.epizy.com/crm_admin_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3293f569-d6f6-48ee-b95b-26917c57db77/best_free_language_learning_apps_arabic.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/77420090911.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/algo_8180_g2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816d69a0-83ba-4f0c-95b2-d55f08a11420/iso_iec_27001_lead_auditor_a_complete_guide.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_off000324b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324B0 4812 bytes
SHA-256: 8d7b2d4f687427ce6a747b0ffd12d5b28d40422d773f5ff04d7344d52f48063f
font_01_sfnt_off0003353d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3353D 10752 bytes
SHA-256: 353b00b5fb5f93caf76c19958db076bb99643c14e85c4f78acd3e3216a0981ee

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