Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac7151bf8a5505b…

MALICIOUS

PDF

96.7 KB Created: 2021-07-16 17:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 37c3c3194091553d389c715a3eac5419 SHA-1: afd9b6a534cc829557944d57cae4bf7d12b4ab53 SHA-256: 2ac7151bf8a5505b36285d9af44d665f3723932bb2631acf95622185ddce89d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains a link farm pointing to multiple compromised WordPress sites and disposable domains, which host further PDF files. This suggests a multi-stage attack designed to obscure the ultimate malicious destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://jkohut.pl/file/12454266967.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ca358428233919841a3800ab26af3a0/98696909216.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/jjn8n1eou0i0u7jgjosqjqoahd/62758052306.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/xawuz.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/84f299b22c6c13285beef734d25e9113/sajatuviwaxakokat.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608af998e5fed---53243672455.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/nu78kls8l52tmkcv8s7gd81avb/42432781288.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/dofepogukikiwikadovazovu.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b6e787ec---dofabuxoguvabuzuvefo.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/cd0eaf4135b63367f63a2d42762fbf79/80845752200.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/88210470579.pdfIn PDF document text
    • https://badrivishal.com/media/61312593200.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/91985550594.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19412b5a1---vuwudisalexunowe.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e8bc1415b---kitamatizo.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c25a52e54bd18537b153e721d54dc44f/gajefetexilameja.pdfIn PDF document text
    • http://fructusartis.com/i/File/93381182711.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/ruvozared.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/54593973106.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098600aac652---8806106708.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/riboz.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/72818022241.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/u8fqf9r8b3922ogtkd8ne9n5r7/latirewolitododevulire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=coc+global+chatPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 20484 bytes
SHA-256: e1d515d7709f6bbf8302b4a216245f5c3b1d7040b442f7443a5837e35eb242ce
font_02_sfnt_off000137a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A2 10084 bytes
SHA-256: e1fc4155c337bb6a240f717444288ef2b25a55a3e2ed1f13856a3a2202ba4ea9
font_03_sfnt_off00014e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E46 17804 bytes
SHA-256: fe0804a5bb9347f5fd17270e977f37c9879d375fe55c29e7334a8981264c6fc1
font_04_sfnt_off00016902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16902 2836 bytes
SHA-256: eab478a4e01eeb4af0b46558f743f067ac50e320a581cd8951b1a802b4581b4a

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