Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c02443fbbed43a4…

MALICIOUS

PDF

84.8 KB Created: 2021-08-21 11:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c5ecd4a2b7288eefaa485a440b2c21b5 SHA-1: b777b4e3e10e6250cfcb50ead441d4677078512c SHA-256: 7c02443fbbed43a4d0067bfefc57b0e5019ded7e8c1b1f9c332546baba79b1e7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised websites and potentially malicious content. The document's structure and the presence of multiple external URIs suggest an attempt to lure users to external resources, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=how+to+get+android+10+on+samsung+note+8 PDF link annotation
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c3b380ed8eb1a13304d9cd833e317e52/46120392837.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3ac620f80371fedacd2080766cdbc59f/lukejuxibabofaderejipolu.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/zujotasawava.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/zujobat.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/fonabojovixudajepitugavom.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/9394528b0ca263d3525a5c580227924e/fokavixekikopomatiw.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/22115720796.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/39722543857.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/62062203850.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c95b0c307---gidelopivenivodavatabitop.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ellk4h3s3e7sfn8f0s982m89pk/lodal.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/o8ukd59osils0c5tbgbuqkpbjg/zosavegusasib.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e96d71f1---vepitawozapejigiruferud.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907a8a65eb4---76748748151.pdfIn PDF document text
    • http://accronline.com/userfiles/file/gawebato.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/zazisaketidenu.pdfIn PDF document text
    • https://toocapen.com/files/xaxinuw.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210812035358.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2cc01aa8---bowazubizugaxitojebofuf.pdfPDF link annotation
    • http://acpiindia.com/userfiles/file/vanovudefo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e2c5be6b---pumumexifulozozo.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/9c39d1e10b33a795b0b50c1f0a2a363d/joxemupipesazosumepejet.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/11720503062.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608757b602b02---levemuj.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://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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 16656 bytes
SHA-256: b7e3204a6653720e9a54097732c58a16af5e25963906c5f4ed988a19bd468db2
font_01_sfnt_off00011329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 11104 bytes
SHA-256: db332640351f7776142402508d3fcafd4d7b434348cc73f66b50026e0dba7329
font_02_sfnt_off00012ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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