Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9875bf105e6e5f9…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 15:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a29a1fd4cfde623ea2add9c763cbbe2a SHA-1: f7a88dad9083e97107ff5bc5cd50825c6eb998ae SHA-256: e9875bf105e6e5f9a69791216541a6cba992c8f91db2d8eefe169158a5f8ecf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://55pluscommunityspecialist.com/userfiles/files/dunanakowo.pdf In PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/tonixadagopenavajopasevex.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/55893539699.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/leq0vcdauf57gfk2b9gotg6qr9/35929173630.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609932cd94378---4246570508.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/ketesexugimapuli.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/616a9b2d475472df0264b99e09072fda/wuwupenovoxepedomig.pdfIn PDF document text
    • https://okazionche.com/files/22743931995.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/94647734470.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/47858609686.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/rajuzevalujasareziwoxovu.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/fokawinekivapolifuz.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16102df178f6b9---pogetogidazubupo.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/sutevokiduwifabafa.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9vn7h7qq34mpnu34mfutu4p5vt/63991109469.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/zelog.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/21698844812.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/robeki.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610099c0f2518---3117459634.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607272e21f554---29453963402.pdfIn PDF document text
    • http://samtle.net/ckupload/files/xesolotomuwuruzemasufe.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a6341362539662e7a3b7e54a5ad29260/letubanatanamavukaruxito.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/80091090912.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65f486ecb0---26867118407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=foxboro+imt25+user+manualPDF 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_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 18260 bytes
SHA-256: 992a53600203b2cbd5f6dd21d4b97d5533cc72f45b6de0879c3450d58a363a8a
font_01_sfnt_off00011734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4B 10844 bytes
SHA-256: a8aeac25e5e47489abce66d4fbd14c651759951c1ffb629857b467555a4035ec

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