Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0e9a1571b21fee…

MALICIOUS

PDF

79.6 KB Created: 2021-09-22 12:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6204def13992490db138bbc779a33016 SHA-1: 4511345a607e39eb17091502fe8ba2e24b5854ae SHA-256: fb0e9a1571b21feeba1a8f1965c9cf551a72f17576ff0838338447da4594b152
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://pixomot.ru/uplcv?utm_term=port+to+android PDF link annotation
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/botapabagefozilakagunej.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/19891575946.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/mijemulugubijak.pdfIn PDF document text
    • http://orthodoxnews.us/file/14171015547.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390e5a5d3a6---27382342894.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/25211305348.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aedfa79256---28376219340.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/25569099802.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/ribizudidedolatoveti.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613d61e819e63---ziwatobizojodixazon.pdfIn PDF document text
    • http://sayarbobinaj.com/file/30229620899.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/17908615392.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210902211650.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/96314520428.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f1622ffd33c9220c5ae028d5f80ef7b7/47775732592.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613567a2a3c16---redov.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/63394643528.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7a39ca151---tanawowopekifibabe.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/34230568605.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133426941f93---42956886008.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/xetilezamewulesalonoz.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3q68d4e6mhj4i7bcv3d817o134/wanolofezuxilagusegado.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/gabines.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/todebavedisodozowevesoto.pdfIn PDF document text
    • http://4bx.pl/public/file/xeponukosiridegefokewiwog.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130645eb6779---37902091564.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/zudutukisaroneta.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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 17728 bytes
SHA-256: aaebc9b799b9d7c810764862d00be1a755bc0cfe18f9789c2c13d333c843ccea
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 9896 bytes
SHA-256: 8d74b57b4594d08ee594ddd7b4319057c9657cc0d156a8828e102b0a97988b70
font_02_sfnt_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1