Malicious PDF — malware analysis report

Static analysis result for SHA-256 9539223c00df526d…

MALICIOUS

PDF

96.6 KB Created: 2021-07-01 00:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: feab5cf9b64cf901d1148cb1145a6e55 SHA-1: 67294aff1441cb7c71ecbadb9dcf40320a0ae8fc SHA-256: 9539223c00df526d6f25fa76613b268c2cad8e78b5a3cbda94d39591c376f0ba
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://drafthe.ru/uplcv?utm_term=does+navy+and+orange+go+together PDF link annotation
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078237b7793b---72396086591.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad898c2cf39---pejoxowot.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca419d6a1a---lenufasawifase.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/23292852831.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/35396751035.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kesilofimivizefuwekijumuz.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210531161558164.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/misobaw.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/au3p6rfv9tc8d41legb3g6sk04/42899564377.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/83522706239.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/74797582892.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cefd52ade00---tufebumuluvelane.pdfIn PDF document text
    • http://mutitar.com/user_img/files/lapataxuzesuv.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c41650159af63a80e5c7a885a590c1fd/32286582708.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607623ca4615e---xetiner.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/d9cc84441f90049464ef680223b8f0a4/xirezugawokuwilibete.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8054262df58a4725c20413b7670967e6/61450336960.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/a543371a589b5b0dfa8e7d1badd9a215/golewovudolavagutowulanu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/pujukuzol.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c961babfda---lugujoxaxorutiwebawomokor.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/f731o9mdkur8uq5m2fh6lva2p3/mexegigijalevufiwis.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/f441nvdvc2r32p6e42a2o7s2h3/26636196737.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/2335521560.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/127100608fae4ab380f82341914ba0de/25156153237.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1cbe69a2ae2fb8c5688d09b6bdf84f44/kujosor.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4141bd5680c2ec4cf999896509688363/28647092772.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/54051365266.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_off0001186f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 17104 bytes
SHA-256: 0512849e8970be2a71707517f50a6ecab065ecde977024e903879ac98cad9761
font_01_sfnt_off00014513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14513 10568 bytes
SHA-256: 4832f5f20f1b0bc6105b60cadacd98b6a6b3fb16fe827c2d325083bca4f3bd9c
font_02_sfnt_off00015cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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