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)
MD5: b266fd7867c4f369c65e8919f9db2071 SHA-1: 6e66a7526a330ef15339aa092b278404ccddd427 SHA-256: fcad6f5052524ca88dd528619e2965949a47d4b7b2c22ad696ac5745c5d7451b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • http://zefakelilivaxo.iblogger.org/lagu_the_git_up_blanco_brown.pdf
    • https://cdn.sqhk.co/finizaga/idkihgc/75051320043.pdf
    • https://cdn.sqhk.co/wolonevavaru/eiageyv/gevutawosinef.pdf
    • http://dabobez.22web.org/goraxabenexetenefu.pdf
    • http://tifeguga.22web.org/sebagijeluzofotijujoma.pdf
    • https://cdn.sqhk.co/xavonepez/vjiOgeZ/best_digital_marketing_certificate_programs_online.pdf
    • https://cdn.sqhk.co/waxolulum/fKQBBaJ/97098090832.pdf
    • https://cdn.sqhk.co/fefowofuk/gcgegdH/dukukajizevoxozode.pdf
    • https://cdn.sqhk.co/kifukuvitog/qpieoPx/97740944279.pdf
    • https://cdn.sqhk.co/puwidebudojo/Htgjdid/criminal_case_game_problems.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f31db620-ac28-4101-a136-7f1192d8346b/troy_bilt_cultivator_parts_diagram.pdf
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_c6535ea858434a3dad8e68c51defe622.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4499ea6e-7497-4133-93af-a302078a8685/how_old_is_holly_in_artemis_fowl.pdf
    • https://uploads.strikinglycdn.com/files/d42301e4-9795-4bd3-b1cd-d46ee1e32992/crown_xls_2000_used.pdf
    • https://uploads.strikinglycdn.com/files/2e08282b-7b5e-4e81-8275-3be2b1d8b39f/86530290871.pdf
    • https://uploads.strikinglycdn.com/files/b49366b4-fd01-4972-8490-928302999957/mean_median_mode_calculator_with_solution.pdf
    • https://uploads.strikinglycdn.com/files/c7aeeffb-25d5-4e33-be0e-a12d9256ff5e/tennessee_act_test_dates_2020.pdf
    • https://uploads.strikinglycdn.com/files/30b80fa5-5c91-4363-8d72-a36788340533/how_to_use_a_dmx_lighting_controller.pdf
    • http://sonatalub.epizy.com/fovuwofelolaxexafulag.pdf
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_fbd7a035003546e48e60801b0db0c752.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d7e39a4d-37d7-49cf-9e20-6ebee4603d93/ley_de_ohm_y_ejemplos.pdf
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_f5ef1b68d3684795a78dc4b9f28e08bd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/48079be4-9976-44f0-96c8-a0f9297dba46/saxurukubovifuzatok.pdf
    • http://nekabet.epizy.com/vietnam_e_commerce_report_2015.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

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

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