Malicious PDF — malware analysis report

Static analysis result for SHA-256 a593e1dade58b591…

MALICIOUS

PDF

103.8 KB Created: 2021-08-01 14:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e0dda916b35272aa54afc220cad43a2e SHA-1: 02a920cec23c7a7e1ff53b33cac8950490d8efb4 SHA-256: a593e1dade58b591d3b45ea4836897871371468fa5becb40664606c649c6236b
176 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, including one pointing to a raw IP address, reinforce this phishing or malware distribution vector.

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://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/kisolinedimimijafepetif.pdf In PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/48219094859.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8a178d2da---nusidemelomina.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f0bd28caf---36059161824.pdfPDF link annotation
    • http://traviet36.com/upload/files/76499463944.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e1f2c2f5404e8d2439c20be9ee91eb9a/57834461306.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766560a5aae---wipesipozosimugorarudir.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/suxejusevigeme.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/0ltr8r38mmb1jkhk67ie9amkkt/79460662394.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/piredumu.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/36061982690.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/8dd273891f458464b065825ee5fe09c9/2915803004.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/gawanigewifipun.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51aa73468---kejalesujusulere.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/527dbcf19ddfaf46cf28d2b9619e3663/54112710541.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/dowinawagonowaxexigavoxo.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/48292306634.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eae079f3f---sovibigedegomifikexekuzi.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/10466193496.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b163ebc3f---fifiwukapixatujoke.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3ovk4rkc9hckl2gf3jrm8aflpv/87912999292.pdfIn PDF document text
    • http://gabortech.com/admin/file/tokulok.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/t8iev15p2mvdcl6bgnob3dq8re/39271979099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ejercicios+de+capacitores+en+paralelo+resueltosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 19208 bytes
SHA-256: 1577d8b7159fb2eea0b81a14329388329f74e3a735d46bc42dab8594c31ad3cf
font_01_sfnt_off00014790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA7 10720 bytes
SHA-256: 5af15558690d72cac33695acbfb310d65ecb66a2001662713e1b084cddc56b00
font_03_sfnt_off00017855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17855 16216 bytes
SHA-256: 8364e4dce313c23728c2b5f8e60c84a32c6289510d87428cb46ed558eb5e5f82

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