Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d29a03b0246ece…

MALICIOUS

PDF

90.4 KB Created: 2021-09-06 07:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8f08e16c06b06f4fd1016196f7028354 SHA-1: aa3108b6cecf6dcfefd261cb5d820ec1b8b3ad6f SHA-256: 62d29a03b0246ecea7cb6cd002b08bae8bba4ba32171d970c3aa298e8f078777
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/94803f8deb4bceb5b87c17a3e9a27029/wozikefedilunalobugale.pdf In PDF document text
    • http://leton.pl/userfiles/file/fawezodopasufetem.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/99506211370.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54712381678.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/91264925799.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/3e78797c2526ddcfa6831b9f6ec0276a/24853696483.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/zirijuli.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a8cede9299---49196925264.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/8vmbosubhe01dlc72nrbil88o3/gomenamenimu.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/79695030239.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/bawiwafekitajugivatulepu.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf99ce7c4d---tinanoregi.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/vatoludopabi.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/46779111713.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e632079def---10023723195.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/24381204854.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/fewuzanojufatabiperopa.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/63087096485.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/18940498684.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/vomazatizekufesagiritul.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8d096a8a52bec96b34899b2c898f9280/16806615910.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/81131801644.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160830d6e55370---wozazerizupexejugir.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/83785453610.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b7aa29bd4---91903517631.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/4hijid0ob8n7rofb8cqg29bbfm/rabefimefezidotun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=willy+wonka+and+the+great+glass+elevator+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_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 18328 bytes
SHA-256: 673709bd51dafa832ac52a75028f3140a9d142ddae549aa484c13786a8726d32
font_01_sfnt_off0001299d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B4 11128 bytes
SHA-256: 81b8b09ef705a69d04dd7b66da617d21085159af7b3f2c902cf8e157274cce6a

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