Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc59743e3d3971d…

MALICIOUS

PDF

97.0 KB Created: 2021-07-19 04:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ff133eb912bcd18433e25bf69b44461a SHA-1: d3ffd5b5b08b5e9fae61a8cc6a46c38479c05936 SHA-256: 8fc59743e3d3971dc7b07f864568db25aedae559fed8b86d1e19a59f15cbb2ed
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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://project-lovcen.me/userfiles/file/61600078630.pdf In PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bc644743f---rinekepalukiraju.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ukicb8s917qtvk2nfr3vh8egg2/3219455244.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a036b98ad---5940702221.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/v8srnnqursv9h7hrr054q3u6i5/dirifujuludinamu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1e6286462d362e6d91c7ef800e3ee8c3/japonebiperonij.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/51440832768.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/8836ae079e4386078692f6f8d5cf1895/zemirawogezopapozufopase.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076463d6957a---95268506930.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/bilerem.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607150bf009ae---pasudipefotewad.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/47683748334.pdfIn PDF document text
    • https://unosms.us/userfiles/file/75937360889.pdfIn PDF document text
    • https://studiorampinelli.com/file/89204762280.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b6c37d4fc---53525951901.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d57204d908d899044c6207b59672e213/zopoboliponafoli.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/17725288307.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a566ac5257---9088588076.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/xunediwabekugovudati.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/4a8b74d8f516accf1826d492c04d75e8/mulipikudimivegujagos.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089f54c1d2c9---fitevitowipuxewu.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/xesesimudagefiwiri.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/xazikomexumuxebimig.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609845195cede---22286413054.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6ef56e01a02848dd966778313d07135c/kuzepolarogog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=application+of+vector+calculus+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 1872 bytes
SHA-256: c34957dddfc30067f0f45530d2a5135ddef2f16dd3712f7206f7b6a332723b7d
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 18924 bytes
SHA-256: 0def83ffe6d24ac57588b8e5ec74c786e4faf48fdd24af8317002b769e10a6c5
font_02_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 10760 bytes
SHA-256: 2dd180a2f354063412841bace7e163b9068e66355617173f4223da2168850a46
font_03_sfnt_off00014745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14745 16372 bytes
SHA-256: 8a390cc04aec8e9eef684e659fabde5164b13725339f19ba9cc5b257d5eb43dc
font_04_sfnt_off00015db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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