Malicious PDF — malware analysis report

Static analysis result for SHA-256 0298ea66454e461d…

MALICIOUS

PDF

79.0 KB Created: 2021-08-01 12:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60a769212a924578cb12a87830d60f77 SHA-1: 1f09a59850cba599d6cb27c2566cdbe429cd469c SHA-256: 0298ea66454e461d6ce6c8e0a902f80344c1edfdfff0fb4a5d732bb5d06ad13a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host malicious files or redirect users. The presence of multiple PDF links on potentially disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160988534a53f2---tajaxonofovixinosegedo.pdf In PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/fc2a885c1361b5d50e4dafa5ec493b98/luwelen.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc19ca96e34---zidijigelunedopenik.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/sevitibisapujawig.pdfIn PDF document text
    • http://pvvc.cz/files/17655109105.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cde5ec1e3---24295602263.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607905706adc6---sigofo.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609099bd387ac---5767231028.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16082a77de47e4---4632656173.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/5a8a15eb69ae98cf8ee5f78d656d6b8a/43904988537.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/gewebobi.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/pabezanosereluma.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/93ad1267eb92825bdb5b6db68e53797d/fimotupifujat.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/22ql4i7bbjbbfesrvm0adsl1r1/fewutu.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/43174fb19d14d5e5f59170b93aa9b69b/minewupekujoruwe.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/3gi66h927m1neoicdltpkb0481/nokotozu.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/zugidutatemulaw.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/3333802067.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/zidodadijakedelut.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/40161183441.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/98787217560.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/bitumapupukabepela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ice+age+collision+course+tamil+dubbed+movie+download+isaidubPDF 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_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 11056 bytes
SHA-256: b41bc3caac4091aef9dc634a2dbcdf15d67080afc3a8f811b638864057626576
font_01_sfnt_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 17712 bytes
SHA-256: 754b07595d523e145a901dd580df5111e3f6d117ebac7d2bf7502aff1e569987
font_02_sfnt_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1