Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3244ff173d7a297…

MALICIOUS

PDF

90.4 KB Created: 2021-06-28 20:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 493c54f24b3ef13bfc2360c400db6551 SHA-1: d126c0ae98df4c7983101602b050c61d84a5f5f8 SHA-256: d3244ff173d7a297222552ea6b420845522615cef446281ac73dff34d319c471
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links are likely intended to lure users to malicious content, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. The document body is heavily obfuscated and unreadable, suggesting it serves primarily as a container for these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ade20196d9a---zuwijogota.pdf In PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ef65lvs4dtpu4f1gqknuism3a3/49485476239.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d449bd20322b346ad8fcf1845bb99278/42038763167.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/54273015407.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081619e6821e---museses.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1d1d96231---puvopul.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/moneg7q6r7ilq5l47hf96v09ca/zudazedupala.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/92592054367.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/mek7ekgd065urn5010f35a0ute/terelive.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/raximuwepokov.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/76446882595.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a71b9bdb---titanakulo.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094218e9b61a---44354757674.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a81c38e42---jotimixejonir.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/bazurutudovugolekimitesek.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/4bb89e57ef12f8cebc7ae49d1c668bbe/sosaf.pdfIn PDF document text
    • https://tycoonmarine.com/userfiles/files/38043491529.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc7a53e410---midefitonugifubejibo.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b58b7892aa0---daribavusovipoziniwut.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/gemewebalasimiz.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f30c5c3199---27342856978.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/30208603524.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b20a8fa0c---kopenipilagutesajimunani.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa55b71237---41182257863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gold+filled+in+spanishPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE1 21360 bytes
SHA-256: 77999bf44cf5a75237c22bb578a1ac0814ccc95103772b6393b6c1e09abc537d
font_01_sfnt_off0001055c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055C 10436 bytes
SHA-256: 51de0aa16f1c518f7a9f4c1329b7de445b403fd7ae484bced717df0e4a4447d1
font_02_sfnt_off00011ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE9 17348 bytes
SHA-256: 6da4e0b2981f51b5328d3a44960fc4d14ec2ab9c35b4a763a41a246876e65342
font_03_sfnt_off000136f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F01 2548 bytes
SHA-256: 2f0a4ac9652bfcf4e7386b833ce1654ec93ae7c13d67b0b2d762a093ba33dc2b

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