Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cea4c96100528b1…

MALICIOUS

PDF

82.3 KB Created: 2021-06-28 08:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6b89495e31874555fa02fd060beba0ec SHA-1: 6e44e94a07040006b39a89269fc910d1fd4bae80 SHA-256: 4cea4c96100528b1adc89448ac4b4b947de2d2a94904f1acb70e9026adb0f31e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a malicious PDF identified by ClamAV as 'Pdf.Phishing.Trojan'. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or link farm attack. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://medvor.ru/uplcv?utm_term=sexy+dance+in+bollywood PDF link annotation
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/6evo3mpm0cp06qlmulpkp00si2/juruseratuwose.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bfd1aa455c565c6ef14ebda75716acb0/litazamakigiluvatovez.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/12275257545.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/8625d339fd6c0a10f9d4e22687176dc2/40986092315.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/58363602832.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/uv1usps1rc1ks8d4chv9bpf5gk/jubunaneramipon.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9dd48f017daadfa8f100c388d0779152/xokafazomimim.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9210aef47---25708607280.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210530220945166.pdfIn PDF document text
    • https://grancom.by/upload/docs/ribukugufofevofar.pdfIn PDF document text
    • http://bakoca.hu/files/file/nobajaxukikal.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c6d642a45---766525395.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3a14bdb6ef967e8f835bd4fe330b928e/dokenirukufarubogibid.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/6667576928.pdfIn PDF document text
    • https://avela.md/userfiles/file/wubosapovolotowejil.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/11529604184.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/526bda2258ef8fff1b7d24dd6fe2c5ad/39401547431.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/bjoo4564geehndjdqb7ns808l0/46126812617.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/d71a6dd4c659ae931092d4bf32eddd10/sesoka.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/piwaleledodasije.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609be830ad4a3---21809149256.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/lopatawamoderowopepev.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1653936cc3a62d18fa354f8a95227be0/dekewenujun.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/crc4ao22h12oalhqjif3m3tm8o/31130764943.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/v755irn5l962dehti3fl4boro4/gaxiwejabubevanujoma.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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 17136 bytes
SHA-256: 972234b42eccf4006c8116473f67f621c1e7ee8a7a74e19a34356777c339aa03
font_01_sfnt_off00010a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A39 10512 bytes
SHA-256: 90e9eed319e05fd612ebdafb6415860d1616e0a0cdad96fd5b509aaa71eed204
font_02_sfnt_off00012259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12259 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.