Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f9d338a18a70da…

MALICIOUS

PDF

87.7 KB Created: 2021-11-22 00:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-18
MD5: aa4889a5ce27b5cfe807080249ced0b1 SHA-1: 88a1969f8026ba25393425643359256f9625799c SHA-256: 26f9d338a18a70da69cf311b2a2bc4830752ea68e041a8bc542d1dbef1132fee
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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 PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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 http://www.superior-inkjet.com/login/ckfinder/userfiles/files/91924410340.pdf In PDF document text
    • https://marblobath.com/app/webroot/img/files/fagolasexi.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/fazevebu.pdfIn PDF document text
    • http://myslizdrave.com/soubory/84276969224.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/24570076805.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137346f5a1b6---61002343868.pdfIn PDF document text
    • http://activesites.atiks.org/files/pazodilulumo.pdfIn PDF document text
    • https://siroyensao.com/upload/files/58903970327.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/tafivikavonato.pdfPDF link annotation
    • https://zzwgjx.com/d/files/lokuvuti.pdfIn PDF document text
    • http://skupka23.ru/upload/m/lakiputemo.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/98578442006.pdfIn PDF document text
    • http://lobi.md/userfiles/file/jolegotorijenagaguzul.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/95208550606.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/35247840264.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/19068794669.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618af4d074d4a---34799006266.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/45736122777.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/vigubabototifo.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/71369050103.pdfIn PDF document text
    • https://toocapen.com/files/xiwazuzajunonujunowif.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2d2437f60822f921160f6b92d66341f2/23678476394.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161822b15709ff---7330220717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/4dZi1sgP-vI/uplcv?utm_term=and+life%27s+like+an+hourglass+glued+to+the+tablePDF 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 extracted file (font_00_sfnt_off0000f4a4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000f4a4.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 17268 bytes
SHA-256: 65a985e24e5d23c3b7cd71da367f8e1dd1195746a6b7afb048a7e0d9b8479379
font_02_sfnt_off00013829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13829 10980 bytes
SHA-256: 4ca1de10d653a2027c56689e4665e4e3470d85b63af84e6422f44426d48bc9b0