Malicious PDF — malware analysis report

Static analysis result for SHA-256 7295d072c2f9bfb2…

MALICIOUS

PDF

95.2 KB Created: 2021-08-03 02:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8b5e8f0139e459193d56d34b47acc27 SHA-1: a82b82c5293581e8e424c1fb3e23dca0b97af5b5 SHA-256: 7295d072c2f9bfb2fcbce16321ba1b173102616e5fc9f487ffeca76eb863160f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable hosting domains, a common tactic for distributing malicious content or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on compromised CMS upload storage further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://picassogift.com/Uploadfiles/files/31948331157.pdf In PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/8a7c2f6bba5ee2209fa768ff0bb66f36/38641585037.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160be97afcbdf4---87510849174.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852fc376461---73540553072.pdfIn PDF document text
    • http://splogservice.ru/content/file/91550089898.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/semasemusonumamofoniwij.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2c4a8a66---zezalozidapukuj.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/86931760991.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/hoa1eeabuaqfi132p8rq68bimv/betopogi.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/82330439487.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/1ae8f4bcee5bde8d963a621d9c0d2706/denadudilovarebadoxonub.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bineruzuligurosijedozowiv.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/79a8fe52d58137a8cc949c40362c6e32/disijepukekofubir.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/vesixamelatezorakegow.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e932884c---wofasagojozukexulafudis.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/69625678056.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/67152730977.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/049451ae39fbf065680cafdabd1d5544/42356036640.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/98717534080.pdfIn PDF document text
    • http://bethelcommunityone.com/clients/880032/File/rosawivawirivezaje.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/kevanivabivesurepig.pdfIn PDF document text
    • https://htchninc.com/d/files/82012012068.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ac35a9a5c---85058293853.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/18700550721.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f4752d42a---64749547261.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/tevukixerivupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=can+i+play+clash+royale+on+pcPDF 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_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 21708 bytes
SHA-256: 1a2d1648d584636f65408eb8346d1d117e4ef83f874b2f315b23b0f1e92cbc96
font_01_sfnt_off00013cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB1 10516 bytes
SHA-256: 8a361b65491149802d1a32da0cacd760de2ef6bd355dede37d6592c7ecced231
font_02_sfnt_off00015498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1