Malicious PDF — malware analysis report

Static analysis result for SHA-256 954c0f98c31b0990…

MALICIOUS

PDF

171.6 KB Created: 2021-08-08 13:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be995526d0e80a5922fa80d0a7ef2b89 SHA-1: d8022dbb6952158221384ffd1214df08df68d262 SHA-256: 954c0f98c31b09907b1077b7202f2a160f5961ad9406bafe26a0bb77f9913d49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, specifically targeting upload directories, which is a common technique for hosting malicious content. The presence of these links suggests the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/aadabe06df7cc379737cec1916c7e3fc/fijesaz.pdf In PDF document text
    • https://alamansyria.com/userfiles/file/36263819977.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bed63801140---mewuluragujadevifudox.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/bb95f36aef2fbca477fc52a26cb9f797/98975281648.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c182e524---kuwogokimofenolotukalix.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083b2bcdb5fa---87670959688.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/xobexevok.pdfIn PDF document text
    • https://capecoralliving.com/media/file/sogobetewokolumegi.pdfIn PDF document text
    • http://sbairs.com/datas/files/devubuvawobebibibetef.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///wedabek.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/podafubevi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/lnp2slq63ahuidf9jec9ne7a44/fonadofud.pdfIn PDF document text
    • http://fairtradeportal.pl/userfiles/file/pawojeku.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/9ltuo8785kq7veejqvlmarjali/pemarirelegeruvijoxedowe.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5c8360ced---27421069942.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a4783da8162444c626c5014c2692eeb1/fopebonemodulik.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077f790e18f3---rivasudalamatov.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/50deecc0554c3d6caf435d057528fa87/77043302008.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/dosisesutedezoguketin.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/19805779055.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/a7ffd991cb79a67fb72d5a786985063c/97766720979.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/14648645123.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/67028310975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=yoruba+creation+story+youtubePDF 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_off000236c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236C5 10512 bytes
SHA-256: 8f94d5a3f055c008dd1302e8f21a0819eb6b96d9b26692c6fc754a31a34785e8
font_01_sfnt_off00024ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000266f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x266F5 23324 bytes
SHA-256: cd90fe84a56989bc36b2f45810de82c5c460da535108a2bcacbe971f209bc79a

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