Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad1ee032cd05678…

MALICIOUS

PDF

92.6 KB Created: 2021-06-30 09:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ffffebbe4545080da76b1e77cfaef8b7 SHA-1: e08782d53415b39c7db1a73e530d34af9e687c14 SHA-256: 3ad1ee032cd05678c95639dd387b54824d3d3258f34b23e1fe6d2bcdcb18d936
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, potentially leading users to download further payloads, and specifically mentions a 'Password-protected archive handoff' lure. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://catamma.ru/uplcv?utm_term=contingency+theory+in+hrm PDF link annotation
    • https://saleskerala.com/ckfinder/userfiles/files/vumozijetod.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097b2d7afd53---88330820805.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4c3efc83---rodowabogevurixitunel.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/5fc5e1b0e1740a9c88e3691a84cd8f9d/96181745783.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2p8te1c2g07hpvg4rb15llisj1/16664888435.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/66370116411.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7adb1dd1b---wotam.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/zemuzosisusagofovubu.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/dedabb9c231a502c6c2f24ac537e86b3/31606223378.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/m4epd1sref77bdsqf5d3q5p6r7/11407327764.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/nozoxekatukomarefaz.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/duzetonugofipunirezupidix.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/dowobuwak.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099619fa649d---25020634143.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/lekabe.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/2295933344.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa9ff878de---sitin.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/41b277a5775a97d6e2ad3e5af46eb975/titodemebodamelemovo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09498e0c8---70073282930.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/gemedufafaz.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/pefulelidisixilozeke.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/sk82mk6r2b99dutjljbucmgdnu/8204490183.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/xizotasuj.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088f82d19732---22382055831.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_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 17540 bytes
SHA-256: afedc4954183cb25d3d55f0d003d39cc13496cb6f6d2b6e090fdfce084380311
font_01_sfnt_off00013579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13579 10448 bytes
SHA-256: 885f4ace87ffb09bc9b40fe2479b3570cd8ecd782e36dca3d4992a7859d9b1c4
font_02_sfnt_off00014d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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