Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d9030a5f8175a1…

MALICIOUS

PDF

83.6 KB Created: 2021-09-12 02:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 5811b16100ef363bb4628592f407e752 SHA-1: 0c2bb293aa6f91e42304dbc74a2dd75eb3ddd768 SHA-256: c5d9030a5f8175a188db210df8297946387f07ebf2a86f11baa1e622c098b2d1
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366fed9d932---81156421848.pdf In PDF document text
    • https://brianhigbielaw.com/UserFiles/file/73323875701.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109071127244718.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/36413241434.pdfIn PDF document text
    • https://mashura.co/userfiles/files/lujuzekejelu.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161361e0ea9131---22967259355.pdfIn PDF document text
    • http://konberdbio.com/upload/files/28591221490.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/pifutumibuzagilomamu.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/76588876579.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/giguf.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/19446513846.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/82823912419.pdfIn PDF document text
    • http://ijfbn.com/editor_up/10227432129.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/62354898641.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/wusem.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/lovasit.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134062e13232---31206335922.pdfIn PDF document text
    • http://bibonatura.com/ckfinder/userfiles/files/zugolo.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/72490924313.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/80373581993.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/rijixeduwelof.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/14798630734.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/mologegexan.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/pidimemevezabinezigo.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/kugam.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/voxazar.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/d24cba17085dd06264775dd919934b27/36466192636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+check+who+visited+my+profile+on+instagramPDF 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_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 18140 bytes
SHA-256: 50925d315b5433def560a2c4429e80c73fecd74fa8c8c8a945471e5813cc88cf
font_01_sfnt_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 11416 bytes
SHA-256: 9485d25b03a742f1829637fcc32535f734ee79127c43e789ab83b5651a527c41
font_02_sfnt_off00012835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1