Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6aca0184b0fb29…

MALICIOUS

PDF

89.9 KB Created: 2021-07-05 09:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cda37bb0c0d96b4bb8d43d1b1e3edd77 SHA-1: c1a357e56cc4d6f09e8ee568b8adc8b4125b069d SHA-256: ac6aca0184b0fb297de4db5de77977283c18fb6d0967668859f586ddd7c17c15
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised WordPress uploads and potentially malicious sites hosted on disposable domains or IP addresses. While no scripts were explicitly extracted, the PDF structure and URI findings suggest it's designed to redirect users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/m4fvc4k5su0of580fd6k7cshoe/sagomikovegukigop.pdf In PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/6269e127007643d5cd7a53e84de10919/moxulamipatevubijavure.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/lunorimaxupodoxixeda.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160daf96b02ffa---93333258189.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bfaf53630---wulowusofotajanisalot.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/febusijatexabimemirame.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e0ea2b79---31276978106.pdfPDF link annotation
    • http://kapsalonindex.nl/images/uploads/duzokoduzarofemivan.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/bodire.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/19454247015.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/519246f30da8aaba7ee4ee7ce0935253/dusazen.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/fc17451ae7163ddf9049093eb21b753e/vowifikubopifajasizov.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7b417e2b7---bizarijivazosas.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073d84694314---33088111918.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/a6138f8f66fe16cfca4b1ca5f60a69f2/kuvenexuxegazeti.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a5ce6c02c3732e3fb4b67dafce8165a6/92460679680.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fd85e1f03---47902625162.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/lujemun.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/im3tap6im7mpv31gc4j2hdkpu1/45255935571.pdfIn PDF document text
    • http://derma-dts.de/files/file/zumofefuned.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608da177ea98c---31471922649.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/36919244517.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607be5f0e6557---vuronizelujalag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=abandoned+roblox+groupsPDF 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_off0000fbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 10700 bytes
SHA-256: 397097be17ba804c78f90bc6efd59ea66428df6bb82f714bd70f18a1c31e9732
font_01_sfnt_off0001140f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140F 17720 bytes
SHA-256: ca1a3d69bf3187957733428a7f13c9102c2e96fb04fbed856b6fb74448088f54
font_02_sfnt_off00014205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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