Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d219130768c851…

MALICIOUS

PDF

81.3 KB Created: 2021-08-20 01:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8714ed72dc66e64295fee6f58f8cbff1 SHA-1: 19a50edb503c0ead3a79ffcc66ccef0f8f632768 SHA-256: a3d219130768c851c3b8c03a6da680d345562777965fae7c9f738d197ecb12de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect victims to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://harryreichert.de/uploaded_pics/News/file/30134064383.pdf In PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7a08e708e---27485993975.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/4427c8b53e8095d3cf8fbdc420c49a14/vanojet.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/mexuk.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210712_2051F64803AE9195.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qedeh1lukk1oc8o5u7og85ktve/65086023126.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///tubirafapuzizupotonexuruj.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb78e8b6d5---24147179837.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c07df31da---jifodikaxebodezogu.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/310cd3fb214ba7d4795375313e266401/62226534397.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4890bc59efaab67a5d635140ee2098a7/jegupulinasodaz.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608611634d7c8---ravilaxifukoditawijazaji.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/49023702484.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/43796374861.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff81926853---nubozema.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1046469133609b6b7997072.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/zeponukidutujusefomitevup.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/fd166326ac02a176255eabd7896d38b5/begefuruxikotokumepun.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/14f1d74d3a59d43cdfef6349c3e83ae9/8696142704.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/59453055248.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/19896279722.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e96ef12b47---bomulivuzidivexuwu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a913bc3bdefa0a04dc40cf92d64b2709/48714456235.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/bb6e357425b3767a5ff887214107da08/71847440707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pvc+electrical+conduit+installation+guide+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_off0000db42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB42 10960 bytes
SHA-256: 5c78af74405f9416a0c263a1a072027ac37b6480c91726c6494f8f578540e313
font_01_sfnt_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 16580 bytes
SHA-256: a828a66971b31af71aabb4dcca3de5d5c58be3d1b98fe6e2c8adf77422fb578c

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