Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f52069b07f030f…

MALICIOUS

PDF

77.4 KB Created: 2021-04-30 05:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 08f77e6f268e2994bfd096a4854ca187 SHA-1: 2c275a7999c7303ad766f969c78ff43b8ba450a3 SHA-256: c0f52069b07f030f42fe49f7995e37777a8bb27ec36a24fae727ebe6b6cf135f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, suggesting it is part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=ideal+protein+recipes+phase+1+big+mac+in+a+bowl PDF link annotation
    • http://kemedejovon.getenjoyment.net/88588163851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5ff7725865c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_6057cb0cadf7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386079/normal_5fe5896fda57d.pdfIn PDF document text
    • https://zanegesolejax.weebly.com/uploads/1/3/5/3/135308051/rukemejilumafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_60336477421b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_6006112ccc059.pdfIn PDF document text
    • https://sadebisoj.weebly.com/uploads/1/3/2/3/132302749/linuvujuviveligi.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/c34f19b1725e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_60341d7669f4f.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/addition_to_10_worksheets.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/napotirojituru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_602933b041bb5.pdfIn PDF document text
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/caea965583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_6ca2566e10d6412ebff5bd1f9615d68a.pdf?index=trueIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_6ea2045ea2b944fc9f8860535b601239.pdf?index=trueIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_6132bf966a814685a585e7d6c87f6473.pdf?index=trueIn PDF document text
    • http://dogiwexor.myartsonline.com/data_structures_algorithms_in_c.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_4ebbcfcb3aa946238d7923c486ec2985.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_722300a1511b4d5f9b7c861e2484233a.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_33abbb7667dc4521bbadcc7c31e88c81.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_93f833ccdd804e91a81ef99ba881f210.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_fc3418f65955429ebd1f69fac6603306.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_df3f4d8754254dfebb13bbe810c6edfb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 5708 bytes
SHA-256: d20fda092d84defc16a54dde6b870bcaa3bbc28645e1d6dc066013db8c846c76
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 11452 bytes
SHA-256: 6639736b7602dcbed60e192073e4f9bfeff4600ccaedde5d723b277094a0166c

Open this report in the interactive analyzer, or submit your own file for analysis.