Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2d7a235d7d1602…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 04:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 19df2bbcfa7336fea83586539d0d1ca5 SHA-1: 17b26d7baa6e4306446816bd5d00e6df250285a0 SHA-256: 9a2d7a235d7d16020f7f2517af8d0a4a47a5795e5d128219d5cd00aa793de790
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript and link farm structure suggest the PDF is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=apa+citation+manual+generator PDF link annotation
    • http://smepil.com/ckeditor/userfiles/files/fibosagajija.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/84378278143.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/lejajezawagotaf.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/unhlk4ungrjmnhrdc76fhp00fm/33445815516.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c364123b---wimadilegetugetezap.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/dilotar.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/68564002542.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/79515776845.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/20247765700.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/62c39bb268b415bb968535861f485258/lekiwadimujalijaxo.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/godanediwij.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/85073788081.pdfIn PDF document text
    • https://clubon.top/uploads/files/75682245898.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/4761881186.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210704054936_jow85m.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/tidadaroxogixoralu.pdfIn PDF document text
    • https://123natura.com/stockages/files/17748180564.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160854efbf0e58---41039715259.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/35127860443.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/73384951742.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/bujixekipi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/r5tlsaq9t2stvk3hum2i9t36jj/gobutatiwajavekagisal.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/21070812543757169127by3b.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_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 19412 bytes
SHA-256: 2ca4f0164f15a94eeede8ef97561c2c9e291eadbbb96f638a8c71a8e2d445e28
font_02_sfnt_off00012a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A52 10632 bytes
SHA-256: 24864ccd0c4eb3b267ecee0a9659f3a09d52bb00d5c6eee101600d44f820fc5b

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