Malicious PDF — malware analysis report

Static analysis result for SHA-256 945c4dcf9a460da1…

MALICIOUS

PDF

78.6 KB Created: 2021-06-26 10:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0451a3b716ae0e3b82a1a6f318945030 SHA-1: 0739b461e75ec85fbce0e8ba5965189ad1f64317 SHA-256: 945c4dcf9a460da11c643243d77f43c8e6e4c525f8b8af03cf6a1f56326bb645
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, directing users to numerous compromised WordPress upload directories and other potentially malicious sites. The presence of external URIs and link farm characteristics strongly suggests an intent to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ludifrance.fr/userfiles/file/rasokufajigufu.pdf In PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/78927186551.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/eedmgd4enjq81t0o60aosdbcl0/21032470656.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/pd5djc0k18f601k38vp8l539gs/ridopefawodomimatagaviwig.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/81e8ed16dfb971a3cf727da88c836be0/xizezo.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ef9c31ea04cc138054de364ab41b21e0/fofekiwitol.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/467a4f36640da1bfe3c23b3223f1cb59/legasoj.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/zojovusodedoze.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/11510936539.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6uiqndk4ee90uaqf46djfbjs16/tokewikoluluvidifovivog.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/84893227972.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/s05hcqeot3ivtmibgnku6usan6/tujozi.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215141322331516.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/9768507862.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/08r5tba92fjr7osknvl1t6fbqh/ronomewik.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/506d5943c6e05f32af25225f64ea6160/67041530560.pdfIn PDF document text
    • http://kaies.cn/upfiles/210604143924297375lyxg1k.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/gidenodokebeto.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec6d30b0f3---japin.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d415b94a4c---xorow.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/97ad9cea58398b1d7f316e0f41b33b87/49296702608.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9372c318b---48248918548.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/mobenalubevubowajajoluwe.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e43a6ce7ff9300ec9ef14502d170ef9d/88946620050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+many+cups+of+water+is+in+32+ozPDF 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_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 11236 bytes
SHA-256: a9d663eaa92a90f4caedb6c75cef7c2c473cdc00355629ec2f957c38b5e4dbf1
font_02_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 16788 bytes
SHA-256: fab7dde20fde5ae0b1e297f0c54da105b8a81752523b6f88615cf2fc47356228

Open this report in the interactive analyzer, or submit your own file for analysis.