Malicious PDF — malware analysis report

Static analysis result for SHA-256 41782e6e16902285…

MALICIOUS

PDF

115.4 KB Created: 2021-09-03 11:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ce0ea3d5d902f975f42f6b9e0b27cd33 SHA-1: 0bd4b7a995028d158b269628e2b265c8e2afb023 SHA-256: 41782e6e1690228582cd0826a8c0f957f07c6f4ee83cc98067c55d65a6988ec2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of numerous links and the nature of the hosting indicate a deliberate attempt to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://alles-vom-schreiner.de/userfiles/file/benisusejixorafa.pdf In PDF document text
    • http://alliusie.com/userfiles/file/zogejunusifatuwurefujo.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/57648541576.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/12886070538.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/18ffb4532f8b4f2608e46a72013db417/34082851059.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/85412138769.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fb210aada---fotuvutebuzavoso.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/84714958737.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161096146e6680---vibirasijasi.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/2133021323.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef4e433830---17471009868.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/wowabasufifagonuwumisagad.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/rasixe.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/71412195611.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6aa1dfb38---96172113369.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed49850fede---46894314311.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5848e25ef9e15c218cb9661d78fbca9e/15180055952.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/komepajumixulonujaxona.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/gabusaxa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7c02f1521---12811802321.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad55b5791e1---josevixonosepudumomin.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/mofimesusuwiwirirojojimo.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f790b972c941f8aeefc27751fda3c8d/26982854862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=b+d+chaurasia+anatomy+book+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001583d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1583D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001704f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1704F 19696 bytes
SHA-256: 3ed0b9a7582adff43c0140fdb1fde9c40beab59efa46b0212a0a34a20b1235b3
font_02_sfnt_off0001a40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A40D 11208 bytes
SHA-256: 25a2dc972f26cf52b2d9ce44a2afcb9b841cab464ef0f78b03f50b43a94bf1b5

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