Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f115937909bce3c…

MALICIOUS

PDF

90.4 KB Created: 2021-03-16 21:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11beb644cad91717af68409cec488d41 SHA-1: a41fc8fe46d5002d4ddac850c4805a18e7460ba9 SHA-256: 7f115937909bce3cf925fa03df6b33ceb1f6ab20abccdcf93c4de3d14b9f0cf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://dugedepap.ru/wix?keyword=gmail+sign+out+shortcut PDF link annotation
    • http://zefujixa.mywebcommunity.org/muzidubimubifanin.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/kawatotowodotipavimosoki.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/guSwTjf/sumewesaxeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_603e5dd676810.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/MCiiAdj/moguwupavumirimisawade.pdfIn PDF document text
    • https://cdn.sqhk.co/wevavagu/aCSENjh/firelilip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_6033a1d2f3c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_6039a7b805236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/16844906665.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_dc51436e3a7c42f68b363bb7769222a3.pdf?index=trueIn PDF document text
    • http://kuwixogup.rf.gd/azshara_guide_tank.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_00cc1a36e75d47f2a2d4b83b12fe0dc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajuse/abriendo_paso_gramatica_answer_key.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_ddff6f261de7472d9d52700feba92038.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_e8674e9ecc414f4891041c8459bddbcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/template_complaint_letter_to_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/how_to_create_a_website_book.pdfIn PDF document text
    • http://bilunet.rf.gd/gatuzikegipuxeri.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_9d6ed3cdfbe74057a9b514a6657019c2.pdf?index=trueIn PDF document text
    • http://palalujopaxuv.epizy.com/free_blank_certificate_of_appreciation_templates.pdfIn PDF document text
    • http://jupejorix.epizy.com/vewetuvafox.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D67 5244 bytes
SHA-256: ad96008fbd2a723060d733e9e2eacde7c12e5d4f1b3b21bab4db2bbf52c74d2b
font_01_sfnt_off00011f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0D 11172 bytes
SHA-256: cfbd155f81116a2868502d573af038f3b7e22c52244f4752604415a85f6b590e
font_02_sfnt_off00014522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14522 16388 bytes
SHA-256: 4189bb5d82d37c3b06c761c00ca3b3c8a7a7312639514cd6a20481e76712d457

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