Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcad6f5052524ca8…

MALICIOUS

PDF

106.9 KB Created: 2021-04-15 20:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b266fd7867c4f369c65e8919f9db2071 SHA-1: 6e66a7526a330ef15339aa092b278404ccddd427 SHA-256: fcad6f5052524ca88dd528619e2965949a47d4b7b2c22ad696ac5745c5d7451b
186 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 disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://xajibur.ru/strik?utm_term=unit+5+practice+test-congruent%252Fsimilar+triangles+answers PDF link annotation
    • http://zefakelilivaxo.iblogger.org/lagu_the_git_up_blanco_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/finizaga/idkihgc/75051320043.pdfIn PDF document text
    • https://cdn.sqhk.co/wolonevavaru/eiageyv/gevutawosinef.pdfIn PDF document text
    • http://dabobez.22web.org/goraxabenexetenefu.pdfIn PDF document text
    • http://tifeguga.22web.org/sebagijeluzofotijujoma.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/vjiOgeZ/best_digital_marketing_certificate_programs_online.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/fKQBBaJ/97098090832.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/gcgegdH/dukukajizevoxozode.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/qpieoPx/97740944279.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/Htgjdid/criminal_case_game_problems.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/f31db620-ac28-4101-a136-7f1192d8346b/troy_bilt_cultivator_parts_diagram.pdfIn PDF document text
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_c6535ea858434a3dad8e68c51defe622.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4499ea6e-7497-4133-93af-a302078a8685/how_old_is_holly_in_artemis_fowl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42301e4-9795-4bd3-b1cd-d46ee1e32992/crown_xls_2000_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e08282b-7b5e-4e81-8275-3be2b1d8b39f/86530290871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49366b4-fd01-4972-8490-928302999957/mean_median_mode_calculator_with_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7aeeffb-25d5-4e33-be0e-a12d9256ff5e/tennessee_act_test_dates_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b80fa5-5c91-4363-8d72-a36788340533/how_to_use_a_dmx_lighting_controller.pdfIn PDF document text
    • http://sonatalub.epizy.com/fovuwofelolaxexafulag.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_fbd7a035003546e48e60801b0db0c752.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e39a4d-37d7-49cf-9e20-6ebee4603d93/ley_de_ohm_y_ejemplos.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_f5ef1b68d3684795a78dc4b9f28e08bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/48079be4-9976-44f0-96c8-a0f9297dba46/saxurukubovifuzatok.pdfIn PDF document text
    • http://nekabet.epizy.com/vietnam_e_commerce_report_2015.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AA 6416 bytes
SHA-256: a497fc52ef216d2369a1cda088bdeb49e1b2edea4e2999984a7939df6a238a3e
font_01_sfnt_off00014764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14764 2388 bytes
SHA-256: 57fbfc35f7b83298ea6875ef2c728d5347e0d62c796c5effcdf7afdb4607e950
font_02_sfnt_off000151e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E4 5408 bytes
SHA-256: d193b8f894fff51ab574ce2300d47cfd0892c3501cd47b6e7e0519db2e871ccf
font_03_sfnt_off00016447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16447 12396 bytes
SHA-256: 99409d1c62f9f67cf8183648d64841dcf85b61937881856dd109737bb85f458f
font_04_sfnt_off00018e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E73 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361