Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a1c5d84a47a46…

MALICIOUS

PDF

84.6 KB Created: 2021-03-28 17:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 547f94c2c356526a18dffbcb8de8c528 SHA-1: d58ed96ffa1c6f4e24b32ece31ec06e3e235e2ee SHA-256: e14a1c5d84a47a46a88d6986103aa9503377b22c8ab761c93a12c5c6d68d187e
184 Risk Score

Malware Insights

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

The PDF contains numerous links to known malicious redirectors and disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leveraging embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=niv+study+bible+zondervan+2011 In PDF document text
    • http://sallehq.xyz/gufoliraramokorigwzkrh.pdfIn PDF document text
    • http://dobuwiwitevotir.sportsontheweb.net/vacuna_antirrabica_canina.pdfIn PDF document text
    • http://leqqurint.online/how_to_pair_alpine_ute-73btf7yug.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/hjjjjhh/23928881207.pdfIn PDF document text
    • http://antileqphh.site/visobiwigilepoifb.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/fDiajjt/demazabawem.pdfIn PDF document text
    • http://maska-respirator.shop/requirements_specification_template76iau.pdfIn PDF document text
    • http://healthyforczechrepublic.site/valuation_gographie_cm2_se_dplacer639fc.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/FKthjF4/street_basketball_association_game.pdfIn PDF document text
    • http://smartbright.club/wubesobu5iv18.pdfIn PDF document text
    • http://bezprovodov.guru/9941173233xu0ty.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/gijR5ES/assassin_s_creed_valhalla_gameplay_part_2.pdfIn PDF document text
    • http://kernig.online/a_simple_favour_film_musiczr56l.pdfIn PDF document text
    • http://fragcups.com/stickman_sniper_3d_mod_apk_downloaddevp3.pdfIn PDF document text
    • http://kpovli.ru/ems_med_math_practiceaonys.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/raxepojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/cartomancy_card_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40fcc067-c89d-4b1f-8bd3-0f4d1150bec5/taylormade_r15_460_driver_left_handed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ae9d32-44b1-4275-afcd-541e08ca5ce5/amplificador_de_instrumentacion_ad620_ganancia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428f0388-07ee-467b-adb7-b33804ded98c/stephen_hawking_film_trailer_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b06ed9-2f27-47ed-ab12-f5a0860a0de4/webasto_diesel_heater_rv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 5468 bytes
SHA-256: d34f20b5fd9b8103a51302a08a53dbbe556764a9df519ebe973057a9fe298e47
font_01_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 11776 bytes
SHA-256: 5b0e21d393a95cb20cfb964f6eece22d19d042cd78fbc61686ef1df429c0d72c
font_02_sfnt_off00012f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2C 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0