Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebf169080c12ece…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 00:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 21763ac437b849354abb9b5c62f66ca9 SHA-1: 72b08e13aa9ef39181089bf04a7e1cbc0c9af18c SHA-256: 1ebf169080c12ece6e2d1d60cc2842ca2fbaf7b766c2eefa35874c1f299fb9e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple compromised WordPress sites, likely to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160beedd317236---25914180255.pdf In PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160907953b0ebc---sifusipire.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/kitajuxetozatofujoxew.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/0e212a2432afe036c9998976a7fb3fcc/vaziweguwejatotopuk.pdfIn PDF document text
    • https://eniedu.com/data/file/20210804035117.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/mimosizetafunabases.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609799c4101bd---tusedogolew.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/48247592364.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cdee41b9c---xoridajolekopabewixuv.pdfIn PDF document text
    • https://ivanamihic.com//files/48046411718.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/tuxejefuwexojapij.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/fanonivowazepebuzej.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e2b6e0170626c0ecce9ddfd37b0eeb06/zaxusekesadisojemodunirof.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c16aaba571a---suzodijuzesizareb.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095e6a86cd51---ribebexumidovi.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/bogerozalimabijunokabibe.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/81012262992.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/9617111628.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/nesarapisu.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/54673596045.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073d1b2765e6---jikeruvop.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021523948544868.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2505068221---75444227252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=positional+language+worksheets+year+1PDF 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_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 10832 bytes
SHA-256: 861421337d51fc9c07d91646e1ae92908ccfa3656507b7e846e00ccaf78d414d
font_02_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 17652 bytes
SHA-256: 507e78d1496f6903c1832fc6efa022cad21faf207ef6b9374eb7d37696855674

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