Malicious PDF — malware analysis report

Static analysis result for SHA-256 a417ace09fc0a094…

MALICIOUS

PDF

203.5 KB Created: 2021-04-07 02:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3c752e4ccee98faff34439a396f78f93 SHA-1: dadc3f6783b9b35facd6dac7c1410d0ffdee249b SHA-256: a417ace09fc0a094fb08eb73ec1426856c6cb5462668035f933277a9152dbcc7
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for distributing malware or conducting phishing attacks. The document body, though heavily obfuscated, contains references to scripture and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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
  • 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://seumenha.ru/strik?utm_term=don%2527t+mess+with+a+child+of+god+scripture PDF link annotation
    • http://xutifufaxe.mypressonline.com/marathi_bhakti_geet_download.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/ba1dad6ca.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/mathematics_for_economists_carl_p_simon_lawrence_blume.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/7505091.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/zifelivuti.pdfIn PDF document text
    • http://sibasijiv.22web.org/61618121683.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/autodesk_revit_structure_tutorials.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/what_are_the_signs_a_man_is_not_interested_in_you.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/dabibawogopozamoledox.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/vazisi/medical_spanish_study_abroad.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/sosujulemijonodeninixuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/sasegojegexogexopuji.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/75702371127.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/how_to_be_a_doctor_in_spain.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/dufifid.pdfIn PDF document text
    • http://kususen.myartsonline.com/angular_5_tutorial_point.pdfIn PDF document text
    • http://pugaperis.rf.gd/39333888323.pdfIn PDF document text
    • http://japamitafixe.myartsonline.com/angina_estable_e_inestable_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/at_last_beyonce.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/pevazun.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/why_my_acer_laptop_keyboard_is_not_working_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/h_m_india_jeans_size_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_off0002d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D382 5692 bytes
SHA-256: 253dc8c10fff4341a46dacfbab4a1789025ba5dbb74783c80c7bcc0ebd0c7afc
font_01_sfnt_off0002e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6DA 23484 bytes
SHA-256: 8d2e313071eccde9d00d7b8b9e82f488e241e1b9b5c2abe8c9a2e87ae8e6a54d

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