Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef949e499ae038fd…

MALICIOUS

PDF

86.6 KB Created: 2021-07-03 02:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2fb0f8c32c6031c68b2af935acabbccb SHA-1: 15fc4be5b14ba341a7b85753407fb05997f0e8b6 SHA-256: ef949e499ae038fd098d82f3ee190d1091f9a04f99ba09f08fd147a23c5c1f96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.sport-konyv.hu/userfiles/file/30190560124.pdf In PDF document text
    • http://risorsaterra.it/userfiles/files/1145921464.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb577a1390---kelufolav.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a667aeb0d71---3293025813.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/134f7a7c4813d03686b84981ea01ab19/zefuwipikeropumituv.pdfIn PDF document text
    • http://runo34.ru/attachments/file/35014472545.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fogukebujumesarifa.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/05c67a5bb940047277cab77055cfd6c9/97621848036.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/76881022869.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/dinunabisowu.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/ziniwudaroben.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/69688938208.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/zaxekiroputinud.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b28679e6d4---bemipunupubatoko.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/76379230127.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621567445.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b081ec96244---9393000390.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a5c5e2b2bbbd41fb9cc43e555e42ac41/28402220703.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/jodajukoperibusumud.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d36ca73b6---49143471992.pdfIn PDF document text
    • https://ienter.bg/files/26445325933.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779d3c1d71---zukudavemeduser.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c5b841e3---vuwilefa.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/58770436089.pdfIn PDF document text
    • http://france-ex.com/dozifaf.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/88358732041.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/92411737466.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=up+to+the+minute+synonymPDF 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_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 10432 bytes
SHA-256: 684bc75aa6f92d3fff7f6c0aa529cca156f5c4f15a2399f5705546cfa08bf095
font_01_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 17508 bytes
SHA-256: 5bca4df366d71b1f5fc4653dd25c03bfa5b8122e88bea52a604ad1510b576cf7