Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7817e39ea35f7c…

MALICIOUS

PDF

91.7 KB Created: 2021-06-30 09:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 857dba53ef756a16122f221eae5ff15c SHA-1: 2c3a908324428068ed8015022e3bf96d78aff9d4 SHA-256: cd7817e39ea35f7cf07c0a35c936c9514c94a40f93594ac80d73985d520a5c54
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pistant.ru/uplcv?utm_term=rugged+individualism+1920s PDF link annotation
    • http://wmc21.com/ckupload/files/wilujabaganodanemeranilor.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ock87poha9l5l8e272jp0lroh4/75763728733.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091856753f0c---88997708365.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/44918292259.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609070fe63045---zawevutoweta.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8158d8cc4e2b46c25fb9a7dcafa94d2d/bidin.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4ng4e4rp4b7lajlsb0kq4sg8k5/suleniwonebesizakuwot.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/894b971437a789e5023b5d27024b929b/70149757986.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/5d5dca813643555a4b50a12f91e6e5b2/pajadidadutoxogi.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/vejiboturusorajinoxipun.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/40423bb37ecb2cf654ded72fb20ca7a5/gipilulanufoz.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210623193354_366747228.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/43130932550.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/5f6c0040b78426383bf3ceeec4251481/64927908519.pdfIn PDF document text
    • http://jarosi.hu/files/file/jimupepisugij.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf3b7081d---77771557353.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762689b336c---99584964773.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/nafika.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qnn48dvkgl5pt0pq1c7d1smr9j/15007444498.pdfIn PDF document text
    • http://sun-tes.ru/files/file/bamapuf.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cc53bce32f2---megonaxifekugeli.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/244a6da2c4c7125a6f287d85464a357d/1732747053.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/gubovit.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_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 10948 bytes
SHA-256: 4ba8c07b0aa1b7d5730008a71005f4b967e21b9471183b51cf900e47630e6da1
font_01_sfnt_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13191 17844 bytes
SHA-256: 08c184b3911d9137bdc59bec10c40973ea5d7e39fd9fcbf91e901d5e9dd89895