Malicious PDF — malware analysis report

Static analysis result for SHA-256 a722a84df2f965b4…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 20:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3f71ee295fd23ce6a7647e78b9956174 SHA-1: 246f664c8798cca53f4c3bd08179b1f51904f28a SHA-256: a722a84df2f965b4ef1f391bf9b8110a5701aade1b473d13707ae13ef986e799
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting domain and utilizing UTM parameters, suggesting a phishing or link-farming scheme. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

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 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://lozipotod.ru/strik?utm_term=best+passages+from+alice+in+wonderland PDF link annotation
    • http://bipiraxas.iblogger.org/popudabagakixobagozepa.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/brother_mfc_j410w_printer_wireless_setup.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/concepto_de_enfermeria_en_salud_publica_segun_la_oms.pdfIn PDF document text
    • http://fegimikerekela.22web.org/akira_full_movie_free_480p.pdfIn PDF document text
    • http://esmoney.site/97843759623tluoy.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/nujabewikuribofe.pdfIn PDF document text
    • http://pristav.pro/rolemaster_spell_law7oz2a.pdfIn PDF document text
    • http://vnds-v.website/dekewazevaradoziwcrj33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8669c1f9-87ac-45af-8a97-8ae208d67cea/how_to_create_a_smart_form_in_word_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71cbf12-78a2-45f8-b4d8-6eee953d8ad1/bimaxuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4299f9-564b-4fe8-ab7d-a14fe22c6251/nibekijimidok.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/85173286110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408a5fea-b6e7-474b-9c0b-a1317d7aacd6/wodewikufexodezavegu.pdfIn PDF document text
    • http://risexogukif.rf.gd/64949847748.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/bomanimogejaloraros.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/ableton_live_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c56f27-ee7d-40cd-90d9-2317f9c72363/30_day_vegan_weight_loss_meal_plan.pdfIn PDF document text
    • http://josuxak.atwebpages.com/39906653702.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/30868121160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4557b811-2a0c-4f25-b24b-8f11ff9677a0/what_does_petition_for_administration_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc24d9f-d04b-4fe8-bbab-dd7eedf60224/bidalalirataroromika.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/ririgatokira.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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 5616 bytes
SHA-256: fb3413907b8139e3ba219141c17d4044a523e561aa849d5fb28a2b667b6f45c6
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 10768 bytes
SHA-256: 0ea002caba0b9d0d9be13565b0e11ab164764b4cf2a0b4519dd3fbf4447df29b

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