Malicious PDF — malware analysis report

Static analysis result for SHA-256 94784fe041c65670…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 13:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 59a981fbea4483919328b18f01f46c4b SHA-1: 349af39917777dad7dc61efb32a357a474571d49 SHA-256: 94784fe041c65670f8a279d5e1a98e55866d8c7e01d7f846944d17d205d27f45
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm is a common tactic for distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bellsazshihtzu.com/clients/878694/File/vaxakonizirubaf.pdf In PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad13426849---26595824693.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/5605127325.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609d911b8d6fe---91698630277.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/u2h7cf2f23dl4u3c1tk59cgnsa/juvogegulikezit.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c252f134bca45620dd9f1ca6036a5cb4/nexazitopolumetevenofefe.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/1474235708.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/bexesitedikememimi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725e3b048b7---27773028561.pdfIn PDF document text
    • https://ferropula.hr/files/21216000880.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a321253a9c6---tidugupapitapiwazanumu.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/10566122388.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/faguzuta.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/38903737752.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/3n3c54krnc94qugn3c9lrbis26/muvirewiwoboxi.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/33278271372.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3f9452a7c852c887109bde63d5968d9/kipogirumik.pdfIn PDF document text
    • http://thedreams.cz/files/lirojotisuda.pdfIn PDF document text
    • http://446888.top/userfiles/file/62365316168.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/kivimizakojejoru.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3847defbc9591d66c3bae84f460bd7ae/19943666977.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa60babb55---jiwiteripajobovagadowop.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f2f38bb39---82230468896.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/27399916425.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/belutofuvuvos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=alastair+simms+master+cooperPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E25 10412 bytes
SHA-256: dd4788bc16f14c3f784d9b2d8a49b64ce9cb9dab3bdb0ac0a69fb4380da26eee
font_02_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 17320 bytes
SHA-256: db45dacce74fa97cb1de2c4ad4ab256e7e4425f2e228b5ce0388c30f37d28468