Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0706cb51e0039c5…

MALICIOUS

PDF

96.3 KB Created: 2021-03-22 13:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 761e5eedcc12deb1dd570bdfa6c6f2e4 SHA-1: 575fe8475cf4b7cb00cbc256fee9f7c8a28733d9 SHA-256: b0706cb51e0039c5d3d3ee93089ce4fc5152836b38fd7766897fc276a8e9b7d3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's part of a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=encountering+jesus+in+the+new+testament+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369183/normal_6004de4a45322.pdfIn PDF document text
    • http://wiinorama.space/flow_chart_of_central_and_peripheral_nervous_systemtjj34.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/a7a1ccd66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_604023feab21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_602b740d1c738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422390/normal_602694f726e9e.pdfIn PDF document text
    • https://vufegolafo.weebly.com/uploads/1/3/0/9/130969987/7a02c9.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/nabivifapomozep_pazivoroxov.pdfIn PDF document text
    • http://freud.icu/what_is_the_best_ide_for_c_on_macx1o8h.pdfIn PDF document text
    • http://organic-ita.space/bundle_android_adalahqht5c.pdfIn PDF document text
    • http://italdom.fun/uplay_crash_report_initialization_error_2ulo3q.pdfIn PDF document text
    • http://akfb.online/1512537461749ice.pdfIn PDF document text
    • http://all-gopro.com/lewis_dot_structure_worksheet_answerk3e44.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/813674ad-f55e-4237-a6f7-421800226254/how_many_calories_are_in_a_hot_chocolate_k_cup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191b37a3-0a2c-49f7-ac84-adf788858bf7/29307948393.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_345ebe286315434b9a7af6d8719bbddc.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_4b7b9432ef274938898c6643b75a30d9.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_32a8782fd3144848aa9c7c0a8d95cae1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e0abb7-c3e7-45ad-97d2-eb7f65a1023f/python_found_in_naples_fl.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_3b452bd02cc54c38ba43bc3cb0eed9de.pdf?index=trueIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_5f29607f790a40ea8a9aa7c6f84ebf9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf08a46-a144-4c32-99e9-c7f4c75c0ddb/las_medias_rojas_emilia_pardo_bazan_audio.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 21960 bytes
SHA-256: 1eece7662fabcd1f73eedecfa35545f6dc6b0ffb6dabf72e564ec9c4c3984547
font_01_sfnt_off000137cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CB 5664 bytes
SHA-256: b6ed7bc87e7edef29ea7f88153fc599a1b0cb06e369aab3c847212cb01f13a6e
font_02_sfnt_off00014b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B02 11076 bytes
SHA-256: 1e061ba28eb48a6ca719f2de4bb1d6df89e813f238bd6eb93d2533039bdb3cd4