Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc7795b879cc4a4…

MALICIOUS

PDF

74.4 KB Created: 2021-03-19 03:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d789d459df625e406cb89b05139398e5 SHA-1: a92f336b7b351e3ed4a8cd4df62d09d6248c514d SHA-256: 6bc7795b879cc4a43157361c6d991abbf0d1db060971d1ddc63f2393d195dd52
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that appears to be a search result, likely intended to trick users into downloading further malicious content. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=pastor+chris+oyakhilome+pdf+free+download PDF link annotation
    • http://juzufezike.mygamesonline.org/pets_and_animals_vocabulary.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/99803062638.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/la_caida_del_muro_de_berlin_libro_gratis.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/d4236a5a-7c3e-45c6-ad86-2883f8284bb3/bemasuvotawavisuvuxubidal.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/how_to_add_shopify_buy_button_to_wix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe463bae-65a9-4ea2-8e96-90aa1e016d19/safety_first_walker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/photoshop_camera_raw_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/padinor.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/gunanotowuxotuxopis.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/sikiru_barrister_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94b314f-73aa-4576-ac2e-64977043a66f/integral_calculus_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/what_does_the_pin_emoji_mean_on_snapchat.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/fractions_addition_subtraction_multiplication_division_worksheet.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/intellectual_property_assignment_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/diy_how_to_make_your_own_medical_surgical_face_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d7db21-a9b0-4bfc-a074-f645868f2562/dworkin_laws_empire_chapter_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/382de2ca-13e2-4c00-a27d-0f4ead2bb407/simarixavivusunawotaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 5440 bytes
SHA-256: 9f5cfc114f34bba9df72dd5e56f0ab5ac8a96da9bdeb63b7196e84f7e06fce23
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10776 bytes
SHA-256: 89dff7fe1bb18d5ac4938213daafbfb2a5ab2b3327dacb193a97d0318d8bf506
font_02_sfnt_off00010dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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