Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba50538c186adeeb…

MALICIOUS

PDF

85.2 KB Created: 2021-03-15 13:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d02f8cda84ce915f10195588623b0df SHA-1: e2cb1bb6343c5664d0a9b5a750a1a4e1666c3d28 SHA-256: ba50538c186adeeb7a599ae63cab08619b7a0c863f0aa7d91c38194d0adb4dde
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. ClamAV detection as Pdf.Phishing.Trojan indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://botokaw.ru/strik?utm_term=fundamentals+of+the+faith+kreeft PDF link annotation
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/letabidewepaki_kiput_taroferoj_fovatipo.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/50481f.pdfIn PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/5356225.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/5760663.pdfIn PDF document text
    • https://kujafuzepod.weebly.com/uploads/1/3/1/6/131637430/2932027.pdfIn PDF document text
    • http://seluluxafej.22web.org/website_footer_html_templates.pdfIn PDF document text
    • http://mofawab.66ghz.com/sirusadatip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekuravimej.epizy.com/symphony_orchestra_music.pdfIn PDF document text
    • http://saginufazefape.epizy.com/poema_en_lengua_indigena_traducida_al_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/moxemumevatazezeguvol.pdfIn PDF document text
    • http://jipajarukureji.rf.gd/briggs_and_stratton_16hp_vanguard_engine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/gutizeliwolupefanin.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/93141619096.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_436d7c7dec9e41569d68dfc97b25d635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/ansoft_hfss_user_guide.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_7bfed61b1567457183fafdd8bfed56bd.pdf?index=trueIn PDF document text
    • http://nunenunewu.rf.gd/72434540487.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_11115ec662df4723b60ac29f6070d91c.pdf?index=trueIn PDF document text
    • http://ritabodaxitex.epizy.com/the_gene_ontology_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/82460882428.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_08bc5692a77f45b6bd86bb15723ae5ce.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_58c846f7281c454ab22d710189cc21ed.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_off00010e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E27 5164 bytes
SHA-256: 2830ea5201af645ccacb51511e20649d49ccabad1aecbe133dfd1e90b03241e2
font_01_sfnt_off00011f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F90 11328 bytes
SHA-256: b299d9be90118e274e346b3637cb3f1c92c7703bfc70e57fb138246cc1fb5607

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