Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ab5324b4b3bf2d…

MALICIOUS

PDF

85.2 KB Created: 2021-05-03 10:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 27af08aeb933f19c523ca2a14e26d45c SHA-1: 51ac6db5ac6d72cbf9bb5d9cea93a027ddb6d15c SHA-256: e9ab5324b4b3bf2d6d1a013dcf3530bde5739101d6808c20131ae5767b28fb80
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with a primary external URI pointing to 'https://soxebez.ru/strik?utm_term=first+90+days+in+a+new+job+presentation+example'. The document body, though heavily obfuscated, suggests a lure related to a 'presentation example', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=first+90+days+in+a+new+job+presentation+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419828/normal_60297c8c16398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fdb7242f2d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_6067d0ef5b0f3.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/pimipetej_zezofosej_tegir_rulun.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/ec0cbeaa2f5f.pdfIn PDF document text
    • https://sudirunerobup.weebly.com/uploads/1/3/4/8/134877260/66442ffb06156d.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/e8f36ef2.pdfIn PDF document text
    • https://cdn.sqhk.co/sobilowibid/WogcJgg/fajakozor.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/8ajejcl/62810624105.pdfIn PDF document text
    • https://bexatebipedo.weebly.com/uploads/1/3/4/6/134631237/2797375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_600b6e070b5c9.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/jbjjCgw/kindergarten_activities_sheets.pdfIn PDF document text
    • http://vowipeg.iblogger.org/vipowujisemixel.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/7502115.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puxakuxuvon.epizy.com/brief_answers_to_the_big_questions_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df49cbe1-9a23-457d-8714-6debc2472767/whitfield_cascade_pellet_stove_control_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcd8432-b638-4e2c-b1d9-9eb43e308af5/fipibunelovosul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea9b851-5739-44b3-aba0-fe839e65959b/bose_model_av3-2-1_media_center_no_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0e1ce9-bc86-489b-9b8d-275a9ad41efe/lubowozuwisususorujog.pdfIn PDF document text
    • http://xujalupa.epizy.com/voltage_transformer_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9dcb29-a766-4b12-923f-750c7bd28cd9/what_are_the_5_love_languages_for_couples.pdfIn PDF document text
    • http://duxiwosozudut.epizy.com/missed_abortion.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_off00010e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 5836 bytes
SHA-256: 55f631744722dfd0bb04f2cefc67a071b216f66943e5a6083c642228553d3f2a
font_01_sfnt_off00012245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12245 10816 bytes
SHA-256: 8ee5f4a914e442687166bfd9b78e3a1196ffae047723d3ee8375cb97ccac45a8