Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce7a1de343d298e…

MALICIOUS

PDF

86.8 KB Created: 2021-09-04 12:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0370ebebb89f6490f77159e5fabf51a8 SHA-1: 9401133ddcd3c2b63d2bb2caf76db6760d8526ae SHA-256: 5ce7a1de343d298e0f19a1c16927cfa3e254164dc2c994edbded632206bda723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URI heuristics and the link farm detection strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://chcial.ru/uplcv?utm_term=livre+d%C3%A9veloppement+durable+pdf PDF link annotation
    • http://insei.eu/userfiles/files/fetudubaje.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/6197042243.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f93d4a44632dcd4b40ed597c1add7e03/pafaxutodoluwesixifodad.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/lofuxapa.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/fceea5f37be5d94f3535a71f70c0b6ff/tepulidufufilugugafiju.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/fawubisemigekemepipuxane.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/zedolinopenixik.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/widusatal.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a1bd3fc5a---getegufitanazezemij.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/27603998186.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c32b73b8---gopipojesanaz.pdfIn PDF document text
    • http://foodsafebox.com/ckfinder/userfiles/files/xazumanirokojepu.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/sudonok.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/16795110956.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c348f9df0fb---74806006623.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/rafagi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/893d56edd553895d89507b2ca9af6cbe/riwubisijunifojugijelevub.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/favibaregireduledalaxamoz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161026334535c6---11597006103.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1f38ebc8f---98494905329.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aef32ed06---25684438272.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/70625277399.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_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 21696 bytes
SHA-256: cfac3fc14c2f17e35261b9596199d2c7a2c626b6e2722660404071e468e14371
font_02_sfnt_off000132e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E8 10908 bytes
SHA-256: 882d820424ed012a30815fd713c22cdf47d3cff5924e148fbf033cb2592e52c5

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