Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0d3c7d15391b79…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 19:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 44b75cdc1204ef83d197f8404155eaf5 SHA-1: db579cafb79ba8cbfa5284f3fea29e6deea8d232 SHA-256: ed0d3c7d15391b79cea1c3bd4aeb0106edf447af0854fd319313c83db90dad05
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to manipulate search engine results or direct users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9073e86b6---99903347355.pdf In PDF document text
    • http://decaldankinh.net/upload/files/kijamuwuxetono.pdfIn PDF document text
    • http://mopron.ru/upload/files/34836286503.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/73412043554.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/26442668243.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/61169100899.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/94737302602.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ia387abt21temqjq4uo5pdt3k1/27194584604.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/fagonufipapusu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073104088971---47037492731.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d67f74e85481c17541e1d3577b3d0e66/kotomurijawog.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/lamizezadedeke.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/38f393f86202fa0b97db15832766cb79/13019726234.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/lasiramazodofemudu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a44516de1---10710376107.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vbfvrqa1p4olk1n784ko22pps0/20118738426.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/4abb6c30ea73bc771480e9779c7e6a05/purovupafuvemubibajepi.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4578f135ae809ff8e366a3f32b175af7/fabopujiwatowinuwaxes.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/55106856106.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/95845304524.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/5815380189.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/60370027616.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/bodudur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=a+certain+smile+francoise+sagan+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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 10944 bytes
SHA-256: ab60706394be855117a1badd88b4c44711d9184d30896c197276fa783c7e4684
font_01_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 19524 bytes
SHA-256: fe6089cf3d87aabe522ef8197a9e03fd58fcbf2d202dab7a670bbb88e94324e5
font_02_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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