Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f597f042869d01…

MALICIOUS

PDF

74.1 KB Created: 2021-09-05 16:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a70989ebe17b61135c32b8034965aaad SHA-1: be918f10012f1edf0a8ca852468ed1bdefa758ad SHA-256: e6f597f042869d01fbdb1ddee7d659aa62d66795f3ba5e8ca02e7f25843d9b18
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malware. The presence of a raw IP address in one of the URIs further indicates malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the phishing and malware distribution nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://moestuinwebshop.nl/userfiles/file/ladawitanubezexa.pdf In PDF document text
    • http://debden.org/userfiles/file/81878364046.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/pifelelurowelapinudiravaj.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/22472770583.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/lugiwivapa.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19aedd7fcd---nufivokodumetixigoji.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a81a3d94---kedotegirunever.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/31d1c406227fe1709682054b415545d0/38250611363.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/14789620997.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/8356532165.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/0edfc5aa02a12b51f1a4964e2a5cef30/jetinozat.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/mmi41gp539d8mg2dgojp5d3lr1/82269564518.pdfIn PDF document text
    • https://successalpha.team/upload/files/25138142641.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/27666874262.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/77052700982.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/f1mcg1k0pocvl9t6nqpf00eect/11805114229.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbc4a869b---8879077178.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/18f2b9db0908f004ba4df70ab042a59d/56780559398.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/fubogabo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8847d98a0---disidizez.pdfPDF link annotation
    • http://nextgenship.net/upload/file/20210806162827670118.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28985c9466---82418896976.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/df111f87f76bcd4c963de130a2a64d75/18939846025.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7ao6c9vlmujg7japgfo6o5bfe0/88569546334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=al+munjid+arabic+dictionary+download+pdfPDF 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_off0000bdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBE 17176 bytes
SHA-256: eeea4efdc3796201a0c482a23b2cdad0c366c631e5207c945afc3c8bbd3c5124
font_01_sfnt_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 11032 bytes
SHA-256: 082e6b47f484a2bc109673af4f73e18072796060260a36ff97a8dbbce7979e8d