Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba2d743ca452641…

MALICIOUS

PDF

81.3 KB Created: 2021-06-29 06:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c057b8815edcc636f37bfbe3db75f55c SHA-1: e7b04454c543c2864c0c8aca7b2cc83375fe703b SHA-256: 9ba2d743ca45264160b4bd0e087664d759f783bf14d39386992a7ab421d911e6
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary function seems to be acting as a link farm, likely to lure users into phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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=exponential+and+logarithmic+functions PDF link annotation
    • https://workinhotel.com/upload/fckfile/jotubelorikuvubinoro.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/4cc6f4c7dd1ef2913feb746032ba0203/70591271088.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/lofajumilesigiwiguloxes.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/d7ab09c8517262f9f859ebe11bd6921d/676535909.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/u7r19insl8q4aek72is5lcn07m/55937771648.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da707b02674---42267050107.pdfIn PDF document text
    • http://fotossc.pl/_files/file/mefupovofametigo.pdfIn PDF document text
    • http://www.emailposte.com/pictures/67361671307.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/eieriq9nj65i69krv57pfh105j/52056879009.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/nanogobesage.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca43c6f5b8---53749024711.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b37946ea169---23621367690.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb03c636a8---38180318303.pdfPDF link annotation
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607def1af1160---5193654709.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/66743669372.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/bemifidapareviveli.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b928f87578e---64303311978.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/8372816831.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/zobiwofi.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/3d7bf6c105598bc6c38fb9062138a452/11161496858.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a529cd2e885---jisinofofugigamataxenejub.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160871def7c527---74344911609.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/59755970057.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD805 17396 bytes
SHA-256: 0ebc92505b8003aa25b4d7dc15b602ca4777c7d5d572063857327dfabf17069d
font_01_sfnt_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 11252 bytes
SHA-256: 6eee749107b78831dfe2691040a79016fc20a192c606926d0a931bf551316ef1

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