Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd05e03500ff15e…

MALICIOUS

PDF

72.6 KB Created: 2021-04-06 04:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 23b2335e5c6b7ef5362d0557426f05df SHA-1: cd712092a1f1064407b26f7a847baf35cd13ba37 SHA-256: fbd05e03500ff15e2b460d1f4d73e399f795e76ae525da998143c78a3364c3ed
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of malicious links and the document's structure suggest it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=honeywell+rth2300%252Frth221+troubleshooting In PDF document text
    • http://figejewumoposes.getenjoyment.net/livro_em_capitalismo_monopolista_e_servio_social.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_601328115fc94.pdfIn PDF document text
    • http://bostpolamos.site/what_channels_are_in_the_flex_pack59pcw.pdfIn PDF document text
    • http://kopaburak.sportsontheweb.net/portillos_catering_menu.pdfIn PDF document text
    • http://towajemikof.iblogger.org/solution_set_of_equation_x-5_-1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410731/normal_5fcab773eb366.pdfIn PDF document text
    • http://tukazijib.22web.org/beats_solo_2_wired_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6048db7adfccc.pdfIn PDF document text
    • http://fukoxonezadanom.22web.org/zofujawoloxalotezibamu.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/characteristics_of_pidgin_language.pdfIn PDF document text
    • http://it50save.info/rinugug8uv67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_6045aacdda9c6.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/how_do_i_connect_my_canon_wireless_printer_to_my_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_605f8c9c4f7b2.pdfIn PDF document text
    • http://sentytld.online/57151070890u1xn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fea36671243b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419194/normal_5ff4d87e60b8c.pdfIn PDF document text
    • http://wonder-ita.space/the_republic_grille_the_woodlands91t0i.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/41a1f8ee-ac09-482f-9c86-7df61cd2d018/how_to_sew_patterns_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79997530-2fc8-4528-915a-d9f61e7d086d/vaditerimexututowogere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9512c1f-1d83-45dd-a754-72a996525786/webamukibamenuxitig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdb43b5-9dc9-4742-929a-2ff0a3e785a4/does_acer_chromebook_14_have_touch_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67209942-1660-4884-be46-db8e37a7423d/hp_laserjet_1320n_driver_install.pdfIn PDF document text
    • http://lujawevelixife.epizy.com/3171244803.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_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 5556 bytes
SHA-256: d359bba927eec39c4aabb20148742c56767a50d8b4029c2b5e7863d9344937f6
font_01_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 10912 bytes
SHA-256: 7b1d80588d42400d3f0f5fb2428293b8538741efd3254cbbd8c2aa0f283d78d0