Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d29051704524bf…

MALICIOUS

PDF

90.1 KB Created: 2021-09-02 13:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5ebd957f9de333f40d50c5868f4b57db SHA-1: 0d8827230500d03b0f107ecc8a4b418882a3cc3b SHA-256: 94d29051704524bf9799eedacc4419576f4bfd2262077190f546dc263d0ecea2
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. These linked PDFs likely serve as lures for phishing attacks or as droppers for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7ae61ba6e---498658878.pdf In PDF document text
    • http://jar-ted.pl/file/50630911920.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e331068af42---nesevubafosa.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/fd631183fb1e4eb0b4bd7c7d5cc2d44a/65521047351.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/65uphvjqd797c1sg153bkf3nte/35961208779.pdfIn PDF document text
    • http://goref.ru/files/file/63114698378.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/zagejibirojevo.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b407e87688e---21462163628.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/63823478268.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16087902e9d48b---77108564805.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086f3980b07c---84071128747.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/31476717072.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/kevozutafufunikebuvesemum.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c7e89549---fupega.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f4989cc354334da45eacb9a0a034261f/nunavaxi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bb75038b919---67735646744.pdfIn PDF document text
    • http://vodnik48.ru/content/file/67133033367.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/sarun.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/p43qvbc77b8elv9h71mpmr5085/pibamakemoxos.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0d76942f---20165211663.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/tozirivojep.pdfIn PDF document text
    • https://fobh.net/userfiles/files/sezomajuz.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/49743896115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=eddy+current+testing+procedure+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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 19236 bytes
SHA-256: 3098eb75febb9527006961595160b44dc8e186436f29f97b30fee44f5e6e7a84
font_02_sfnt_off00014183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14183 10784 bytes
SHA-256: 42cc1bddf3b7a44bd55bff74d357a058ddb69516c70ffd8343ddc905d08b7ee3

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