Malicious PDF — malware analysis report

Static analysis result for SHA-256 41978974e5bfa450…

MALICIOUS

PDF

120.0 KB Created: 2021-03-28 09:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7775374c62a07183fdc795e40c8d6648 SHA-1: df53403becc99264ecb1b1c4b580b1a9be79de7b SHA-256: 41978974e5bfa450cef0999dc6ac33250f7ea326d64a367be7dd1ceeee885479
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic findings point towards an attempt to redirect users to potentially malicious content or phishing sites, disguised as review answers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=chapter+1+cumulative+review+answers PDF link annotation
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/93db7.pdfIn PDF document text
    • http://lazezubeb.22web.org/agile_software_engineering_process.pdfIn PDF document text
    • http://zakugajogaz.iblogger.org/abviewer_to_dwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_605994eee0b59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fca2e2488d09.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/ranemuwaxit-wojexuwe-kebowazo-vetuzogevuxin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393193/normal_5ff8583c7ea7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_601eb54f68bd9.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/iKOvgib/red_robin_locations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_60273e89e7538.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/7110575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_605d982303aa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_602ac16b42472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_603e604624428.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/2138ca3e0.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/MnHjh7I/20984782637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5ff54713a2568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paravewufazik.epizy.com/fosutigupofopef.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_1baa73ce79e94ffbb235af8dab3d685b.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_0a5cd3c70fe6474a846d1003ef5f1a25.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_53a3cac619e049d1ae24e30d524d8179.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_off000189e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189E4 5284 bytes
SHA-256: 8e696e50b7aa479b433290210b589161c657994e2f24945b313cce57ceee973b
font_01_sfnt_off00019bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BBE 3164 bytes
SHA-256: f0ff346b00c63b7b23f02e7fdc9ecf3ce88a4ebab6bfbc7eee3b0a0366b9334f
font_02_sfnt_off0001a86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86D 12324 bytes
SHA-256: 896cbc98daae331eaed0eadf78e2b7bdad5271866b84e501ac2863cd06ece166