Malicious PDF — malware analysis report

Static analysis result for SHA-256 34237c9c18d97916…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 20:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3636c251fc87c57fec9096a4b064661f SHA-1: 1762b37c9c3273233bc3606c1d86b3e9620ab138 SHA-256: 34237c9c18d979168db9ed1cf1a7fc90499d5455cee2f93e4e94b4233800ac31
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://toolsatool.com/userfiles/files/95835961640.pdf In PDF document text
    • http://alemotta.com/resources/original/file/satazabetugixu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c1e60bf2---16327175304.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/74528832726.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/6922493983.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/04548b3720f9daf376b929d014de9afb/galajorudewavapebur.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/70627053139.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/95562749436.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7d856fd696b0987259d0d64774614365/41967750739.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/rg67ged40k0kl1mpdm88ikkit5/99716947998.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/u9cnjgo8osiqc8gpa86jjsc6oh/23626927941.pdfIn PDF document text
    • https://energooptima.hu/upload/File/10505422506.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9b5d81e807a907036956b97faf376e7c/15346390700.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/f35go7868u6c1buc9eklv0s1n1/18488003760.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/75392926224.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/aefb17da42f83cd1099a5a6ce9a02352/zigezosozixixuxiniluxu.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/70833884383.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2f32c0394---teloxugu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/26f8b97d0ba2430d8767fa4db6bc49c2/23458102547.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/jspss3gajjq32ae2cg5ra0rq76/domototilebutupu.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7fdf16d88---misusem.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/fe18gb1lu75omo1ek5ue2ovc34/rogujukovuz.pdfIn PDF document text
    • https://termoformat.md/img/files/runopalolotaz.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a690fb8ce5---xaxidekuwomoxasegozedema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+many+ounces+is+2+bottles+of+waterPDF 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_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 17420 bytes
SHA-256: 12277d06233910cb87d5039be6dd10d22ac805254398ae9c1b750cc3d83f4218
font_02_sfnt_off00013047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13047 11048 bytes
SHA-256: 2193822fc07beefb50cee3cdbda633abdc99c84719e5e92cffcf157c0be536c8

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