Malicious PDF — malware analysis report

Static analysis result for SHA-256 932596df43739cfc…

MALICIOUS

PDF

70.9 KB Created: 2021-09-07 19:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4d4c37e9b421d8cd0ca4cf62c35425b9 SHA-1: 1686c32d2a6c77590c449bbd5520130f33cda6fa SHA-256: 932596df43739cfccc3724ae2b0c37da434f78a5d0b9adf717ae1258e0359465
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection name indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cbd916a20f---58600024159.pdf In PDF document text
    • http://salkim.com/userfiles/file/11926430003.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/87160634417.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/tesizovumik.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/37815945226.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117c6c3c18a2---204013591.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/36843be88ae0e8b2357f7eda762fd1e2/79319245515.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc0ee5514e---faxokunadolegabovuv.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607580271368c---68466375642.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/38743468248.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160773a3004255---sinubajuzunonuvibuw.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/mozuvaku.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ipk2j6l1v1c6g8vhpm26rep955/75034059277.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/files/lowufakeximutiwikixevonu.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/goruremenedaworeniginigij.pdfIn PDF document text
    • https://12shio2.com/contents//files/7385315757.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3460a34409805d8a79463a59f17a04b3/70493514738.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f06d078bd6---warurugojapomaxe.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/juvagivupoxedenuraj.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/89942236063.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/a22996aa1dd72c22bc3544ea0c679d3b/sakibi.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/14cb4f8e6b6eec6615f8c3e9ab022764/78726298286.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/61230233025.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210607143349206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=proteins+synthesis+%28translation%29+worksheet+answersPDF link annotation
    • 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_off0000b431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB431 16092 bytes
SHA-256: b6bcbf1a8b7ece203bbd411fde3e432381a8dbed9f2388185ab3cfe73d4d7375
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 10656 bytes
SHA-256: 7c722d26df7025553b860b28cc9b53a63cbac68031447d7b5e8ab216c140f2fe
font_02_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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