Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c7977ed3c69a57…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 17:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9679c01c87279d212531daca4ac334f2 SHA-1: 96fe1488e981d06b9a82f0770ea1deb63e3d99f8 SHA-256: 38c7977ed3c69a577646b4330f4b6417b0c75014b1a42c65dfad1063d3c3e195
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These sites, in turn, host PDF files that likely redirect users to malicious destinations, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://medvor.ru/uplcv?utm_term=exposition+rising+action+climax+falling+action+resolution+worksheet PDF link annotation
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf1243be05---luvopemoxokisuxigajekebuv.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/dumenegexigazekopewo.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/28474566695.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611c9a08a1253---63540358000.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f2100a28a419e43fcb3fa6568a91ca90/36299814421.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/57948508073.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b25112a400cf543a48f623037db70ad2/bagunowenijuwadunul.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/97890074805.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/82914423067.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/4909860072.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/xupagoguzokod.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/576fbc0bb494e73a46f7e11f5a5cf4a9/81112679308.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/losesemolukoleme.pdfIn PDF document text
    • http://npas.ru/pic/file/34383404770.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ea61b1025c154c8494356503b14431a1/76300187190.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612950ab5761c---21355900703.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e6d696b62b4e6bf7cc740339495c00ff/jifut.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b65df377c0---22392420652.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/pebexudorugotemikoril.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/zenejirinixezupava.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b99f5f565c9---98760654801.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/6009172244.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/47753109125.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24d37f56c---87351128519.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/rdej17vkg4k9eh1r8mjerhpt3v/zarobulixonodojeja.pdfIn PDF document text
    • 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_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 17524 bytes
SHA-256: c87b1f5896577e3ff2574bf8c726e1e63e087b0c0a49e1cd3474c0a6462244fc
font_01_sfnt_off00010633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10633 11292 bytes
SHA-256: 105530facd666e3f740387b925136058f5896a3de9e5b7f2f761bd0d9eac89cc
font_02_sfnt_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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