Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e2da37dd9e6771…

MALICIOUS

PDF

84.1 KB Created: 2021-04-07 19:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d71831e561f276a1f8ce000883902974 SHA-1: eb527d11a233f3ea4e92209a0f33dfb7c79a528c SHA-256: 47e2da37dd9e67718eca4de1cc26a8c472b83b0e62759b1a27278f976d982725
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a notable example being https://mezovuduw.ru/123?utm_term=apple+themes++for+pc. The PDF structure and the presence of embedded links suggest it is designed to lure users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/123?utm_term=apple+themes++for+pc PDF link annotation
    • http://vatamuvemazaril.sportsontheweb.net/aquelarre_juego_de_rol.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/1a5d0a92-941d-469e-aa7c-4de3365a29e5/julius_caesar_act_3_scene_1_modern_english.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/d._a._r._e._report_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/nejedemate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c142fb3-0f09-4e40-b9d0-a3d1b812156a/neripebabonajiwodo.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/email_signature_html_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/what_element_has_2_valence_electrons_and_4_energy_levels.pdfIn PDF document text
    • http://soxarigur.myartsonline.com/favoxaxaretawovid.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/70124282861.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_911b7dfd6cde439395dd2aab4084077a.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_6326708e681143e6b5f5545b061e9648.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/578e62d2-ec90-44d0-916c-a7f01a058b57/norse_mythology_loki_parents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fe2867-5b6d-4014-8e7e-71e590eeb886/what_temp_is_high_setting_on_slow_cooker.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_bba91ea87cd042dcbd2d1faf7cdd1fa8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8a13ce-0ebf-4720-bf09-02c7febf8311/54532042740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4e574a-5520-48da-bd83-0bf38f8d74e8/aci_301-99_specifications_for_structural_concrete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24d3cca-f9f0-42e9-8854-f598dba29bef/nenoluxovajumatora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e16203-5fd1-479c-b077-0b34e2c27a61/zeluse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913da184-482b-45e4-b211-ea8205e86fef/how_to_reset_check_engine_light_2008_jeep_grand_cherokee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0133b634-33df-4855-92ab-08a4804c3fd3/92935300208.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/wiat_iii_score_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb61b9ff-2eec-4ed6-b9fb-3c3a28a2491f/dnd_5e_guidance.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_off0000fe78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 4668 bytes
SHA-256: 35efe3d7f53ff4a06f1c08a6d8abf26a96a767be8f76c0390c5a81945b5a94ea
font_01_sfnt_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 10784 bytes
SHA-256: 34d99dc715c4e97ee09cc3e5b70d327dcd1611e318dc76c70736bb14be400739
font_02_sfnt_off00013374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13374 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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