Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3fed8588a42cb3…

MALICIOUS

PDF

109.6 KB Created: 2021-07-02 17:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c3237cce35d235994d402d2f7e96385e SHA-1: 2fbce6e4b460edca010ef3dde4a9dafe4638c998 SHA-256: da3fed8588a42cb3631447353766ce854c6e6f22edb32749a18b414e7f655006
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded links are consistent with a tactic to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0ejhro7902r3kvof6uthv5i85k/73830289072.pdf In PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6502461689d11c8387fe60e01240ddb0/vojafi.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/07-01-07-07-00-57.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/48244506925.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nqjv3rsk4450nirsp0638pupm0/xapusorafojumoruviliz.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/nawejazigirekobulid.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/50775407722.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/o3bgp7kmb7g1pl8n5hots4uf30/soxekurolabixojezitilezu.pdfIn PDF document text
    • http://garderoba.sk/images/_file/daxuwozosutabetavuxufevu.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/89211246904.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608895880c2d6---9890864335.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28f0fcc729---63605526399.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/ziwizatedukijetamutivobe.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/4d2877fc0da81e3f1496cb242569f3c4/fojakaxitojufitapop.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/derovinopi.pdfIn PDF document text
    • http://aplus.to/userfiles/file/gutojizukipofiwedet.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o25h8cfu83b77snbetljrt9038/23818794591.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dc7c44b3744---fuded.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/81508248035.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/gototititizuzafadugigedi.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rfgabrs1reat576nakl4kmothn/duped.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4248e295---67090816346.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/49099316619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ludwig+wittgenstein+philosophical+investigations+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_off000146c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EDE 11008 bytes
SHA-256: 9569b0992270511517cd23f71a57698c378dc8183126a1e11b101c9aee45cb6d
font_02_sfnt_off00017835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17835 18420 bytes
SHA-256: f32f9414e24fae40dca8608e3fa4e1210d6bd3a55f11d43a4f0fc46e9b189a80

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