Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9cbd76e871cb98…

MALICIOUS

PDF

77.8 KB Created: 2021-04-17 04:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d8f902d7f6c6a18d6bf28cf859c3a3ff SHA-1: 03d014618e820e5345242ad2e21ced16357504ed SHA-256: 0c9cbd76e871cb98cea4290a171db1f48a8fc52c049ac3e5aa2a429368365e3b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine rankings or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to a redirection or download-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=2019+evinrude+e-tec+150+price PDF link annotation
    • https://falomomorojed.weebly.com/uploads/1/3/1/4/131438216/7512847.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/kotori.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/what_are_the_key_words_for_multiplicationbv453.pdfIn PDF document text
    • https://kefonajivivuz.weebly.com/uploads/1/3/0/7/130776591/jeneja-jutiduw-kalapofob-worirufifim.pdfIn PDF document text
    • http://steh-sistem.ru/47951091694f3cr4.pdfIn PDF document text
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/2b61c6cd.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/9303506.pdfIn PDF document text
    • http://kungfumalibu.com/welajodixerivoluo34dq.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/popilo/english_speaking_guide_st_petersburg.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_aff43e42f1c441bd893af9252b3fe6ff.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_ade1edae4d204fada8aa50bae8bd9659.pdf?index=trueIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_d290a9f12e574ce6bce2a7f9f265fb39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/49656435103.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_46f2967a8a6c41b9aae18fce84cf08f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/32095140569.pdfIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_91a6a6f20480479292c788c64c356241.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_1a4bdd8c223945f498427a4d08cb3a7a.pdf?index=trueIn PDF document text
    • https://dd3a609d-fcd9-461e-ae06-f7e9ec6f332d.filesusr.com/ugd/811c3f_538e47a89cd74baa8b9e33f08f65905f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/how_to_convert_jpeg_to_jpg_in_mobile.pdfIn PDF document text
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_523a97780f42447f827afc0b9067149e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batiku/software_testing_experienced_interview_questions_and_answers.pdfIn PDF document text
    • http://bopubedoru.myartsonline.com/adaptive_optics_in_astronomy_roddier.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_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5252 bytes
SHA-256: 81d4f72761fa0a161ce415945feafdffb49c2b89b4d794cd6962990aadf86ef8
font_01_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 11036 bytes
SHA-256: 79aa0f6f0bbe8a817ec8ec7dbce9a25890bf15d936e91679c94d7b46e5c3f635

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