Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb9de270adbaf04…

MALICIOUS

PDF

195.1 KB Created: 2021-03-14 21:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: dcd36c635d6e6183c071dc30a9be8573 SHA-1: c8c194713eb6ae238050c14bcd4a36a29cac785c SHA-256: fcb9de270adbaf04cdd9d2ae831c7737200bf2043628c6fe138d2094ef12b6ac
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or deliver a payload. The document body, though heavily obfuscated, suggests a lure related to 'logical fallacies' to encourage link interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=list+of+common+logical+fallacies+pdf In PDF document text
    • http://yarrebitteh.online/comfortably_unawarev2zsi.pdfIn PDF document text
    • http://magazinrf.xyz/agb-001_vs_agb-101tqz3q.pdfIn PDF document text
    • http://bridgecommerce.com/organizational_structure_definitionnoj4z.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/90307187978.pdfIn PDF document text
    • http://sale50.pro/contract_curve_for_perfect_substitutes_and_perfect_complementsku0k3.pdfIn PDF document text
    • http://metryck.info/create_a_frayer_modelkhug2.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/casio_ctk_7200_for_sale.pdfIn PDF document text
    • http://latencfsrt.space/amtrak_jobs_near_me1ikba.pdfIn PDF document text
    • http://sodalabs.pro/new_disco_budots_remix_free9z841.pdfIn PDF document text
    • http://tibetterrier.ru/346292813499v5et.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/2nd_grade_math_assessment.pdfIn PDF document text
    • http://ogranifruit.space/cost_of_private_piano_lessons_uk4go9x.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/whats_the_difference_between_jbl_charge_4_and_flip_5.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/fexuwusikise.pdfIn PDF document text
    • http://parhelifrl.space/39229757480c1on4.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/ddb51098-7686-4492-97cb-fc9a3d7ffd6f/how_to_draw_isometric_view_of_hexagonal_prism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1190d0f1-d7cf-4c3f-be75-476b1a5d8822/d_and_d_5th_edition_players_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1711bc50-7f5d-41ed-ab2a-055900b21d1f/how_to_read_the_akashic_records_by_dr._linda_howe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d096194-f2bc-421d-98b4-f9879325ac1f/area_and_perimeter_worksheets_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae14767-8d7d-4993-9e7d-a0ba7ffda4b3/niravo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446ddd29-26b4-4467-a3c7-40d9d4778c6d/us_military_officer_pay_grades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd165cd6-7987-49d2-9076-e8aa3714dbd8/english_phrases_with_urdu_translation.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_off0002c4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4D3 5320 bytes
SHA-256: 144d4a209fb3732e68873cbc38506efdb2e4e6a697041e98f2b13cf2d08efd39
font_01_sfnt_off0002d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6E7 12060 bytes
SHA-256: 9dbbb7df06f09c2e8561aa3f7990b7f66db2e1721e5e59459a7160527245b066