Malicious PDF — malware analysis report

Static analysis result for SHA-256 db38a120bacb07b9…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 02:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a0d7010f9cb1b20fff339ebda1960eea SHA-1: 322975969b5dd5792b8d96e86f18d7808ec392aa SHA-256: db38a120bacb07b97b41a9f1faf8140b5a79b82d10ead5079d734d106e4f3628
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of common phishing lures.

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 https://laborke.ru/uplcv?utm_term=performance+testing+with+jmeter+pdf+download PDF link annotation
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/a3b7944d579a778ca70d1b3cb44efa2b/pezemu.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/rikeminaxasolotimozar.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/gofotazujenitanidif.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/85217369806.pdfIn PDF document text
    • http://come2menorca.com/images/file/60966666330.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/basepu.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/91953624520.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f50c878f74d2c741a1719973558fd9d7/71786857331.pdfIn PDF document text
    • https://jobtiara.com/files/files/67970465261.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/7cd18da24bd0ea15144bb424832b4b5a/56589174797.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d8fa054e90223108c40c38ad251dab67/nulikoxuvezal.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114fe3d02e6e---kolinifigok.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/ab6238224bc62568287f92d5c0bae03a/48040073374.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/33440365042.pdfIn PDF document text
    • https://brmc.jp/user_data/userfiles/files/41899014061.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/sao6jbh1n1arainepk0aptoh8k/20519011243.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/1edb49c045c9c8a67f6ec9273074edb8/rusudalasitufug.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/eddbf7b63222e4498c9d36d1e350d139/91168120914.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e04294513a---sozixewogorelefupuwuna.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wujeberenivexesivuk.pdfIn PDF document text
    • https://loctra.net/userfiles/file/69892499861.pdfIn PDF document text
    • http://zxsolar.com/d/files/bilolomalipi.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/70193231544.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

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_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 18352 bytes
SHA-256: 24675e5a9ea444f2ea8059919360dd4b37cc20101fe7e15dd95aa08dcfbbfd1a
font_01_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FE 11284 bytes
SHA-256: 5b12d39513cf3bf206b8e912daf8c8272a515a0f81c260dd34b3b2018ec58232

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