Malicious PDF — malware analysis report

Static analysis result for SHA-256 6167907a0b9fab0c…

MALICIOUS

PDF

80.9 KB Created: 2021-03-26 18:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9aa110ec3f5500235e907024c2a3535 SHA-1: 982e3264f32b57bbc454f203cc75c721a5e2ff07 SHA-256: 6167907a0b9fab0c9c5b4cd1da0665b97f8acb2e460de290b1490ee4babb5bc3
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 hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the PDF structure and numerous external links point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=how+to+start+onan+5500+generator PDF link annotation
    • http://vkrowl.com/modelo_atmico_de_schrodinger_resumen4gal3.pdfIn PDF document text
    • http://center-about.com/72341117524trai8.pdfIn PDF document text
    • http://natorg.fun/31984923084lkiu.pdfIn PDF document text
    • http://yoga-fitness.space/atomic_math_worksheet_answer_keynupgn.pdfIn PDF document text
    • http://dress-russia.ru/fleck_7000_master_programmingf8ppy.pdfIn PDF document text
    • http://lolkek.xyz/what_is_ethics_in_health_educationg1nu9.pdfIn PDF document text
    • http://gonzo-3d.com/amelia_bedelia_chapter_books_levelk6w81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_2520e441fb5544b1b17ed14eeabe102d.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_bea7a426500e4916a18c47ae4357174b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbe4efc-32ab-406f-b182-c4e77b4ae6fe/68021128013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e6d04e-dc00-4d92-95a6-023b67b53137/20952628849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68562c01-9244-4f72-8795-760a94971478/mutedizalid.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_0969ae32f975429595d247924704e67b.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_1ce241611b8842be8f1db6e15530f7e8.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_8bb690b6b8c1494cb12ddd0786e57aae.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_a35793c0af58413ebebac8665f18cfac.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_52473556cd674a098e036ccc212eabcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e90c17-a955-447c-ad2d-40c1cd774f1f/rudijojuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba84ea18-8228-4d70-b64b-6218dcdefe96/dell_p2415qb_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769cdf0a-cdf2-4130-8803-0ff20caeb79c/falawivejobudotajik.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_c389f8c3ddec4cc6b56fbe0b54b2ac58.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_600f20f7e8e64966aa1d044584b98969.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66311a14-e125-4c44-9f24-481f85808266/pepazanuwoja.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_6118100aa3b34e4ab74282ca1636c807.pdf?index=trueIn 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_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 5140 bytes
SHA-256: 550a1df19c8fa147d324831054a04e793b516d97dea3258f27df9866fb43ce15
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 1936 bytes
SHA-256: d2cd98eda3bb301c349f83497b116709750aa4c373c9bd198ee53ee8aab646d3
font_02_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 11480 bytes
SHA-256: 3299a4e3911b5c46e296ae1d3e5ba4ab696996e483b7d573880f44221c6ce55f