Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd886cf094566cba…

MALICIOUS

PDF

90.4 KB Created: 2021-07-24 11:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0a34524bbcf291a500435b1b0a62ce45 SHA-1: abb34911536b81795ec6c1244998c05916f8cf33 SHA-256: cd886cf094566cba19006b7be6b775907f5781142e77129b9297d887e02febae
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of external links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16ea05fdd9---77734255863.pdf In PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/86822203576.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a05e5060---33475091733.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ef317784b7b1b5d424eeba1822bbfa58/nasejigazunipekolokixesox.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cqk0unk56ujtchjjfn4m6qgo2/namixiwamekegopobesesu.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/64175683683.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d463e7d603---50228481666.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/fab345061e3b5eb4de346c411a56a7d9/petaxezuze.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/4668876531.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/4fbe2be734f63c69329730b3c4195c95/76138846914.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/vokudapowugosuparawo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/843c0a772552c9ee0d64148da2f369da/volokigenuguripitewajude.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b7c2fe416dcf305bf5f18effe075c794/47994716094.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/50154630927.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983edb7aca7---87156338552.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/5400700427.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/satijunixedarubule.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/87771d0499174f3282d3b10d80fb5de0/wogizararalital.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7e1bbf0c9---15715761544.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/timowusapexizi.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/874dcb8d1620ddb981dd6fca72d571d0/murafugigidukafi.pdfIn PDF document text
    • https://dacola.com/upload/files/45571863209.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931768038e5---49207191042.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///xeposamagiwuvukera.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/55b638cd45f4ccd8e7e68e0ed94daee6/rudavubij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bancomer+swift+codePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/09be21f226c39fd2fb07a57853484734/26329912893.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_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 10732 bytes
SHA-256: a17ea4c1b2d725207c30560719397832ece4ed99cfd9a1fde2952c5a90b6c28e
font_01_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 17464 bytes
SHA-256: 8340ab79ffca767040ca72010d1932e1ad16af6206229e912d0ae4738e77954a
font_02_sfnt_off000142fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1