Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe46b3c80b30ad6…

MALICIOUS

PDF

88.8 KB Created: 2021-09-16 16:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0147847fd6abc4b92479c060a00dd5f8 SHA-1: 1a694ba59b950661aafa8e1f22f5ab6115ce57f6 SHA-256: ebe46b3c80b30ad697388196ea6edc30ca09e42d4b30543a56d51f24df99ca70
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 files on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked PDFs. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://avision-italia.com/userfiles/files/7738958164.pdf In PDF document text
    • https://tsegypt.com/file/97336846066.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe0a166a5---kiwasa.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/94662850015.pdfIn PDF document text
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • http://studio70.eu/userfiles/files/bitafavosiwarejivuzexo.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/61881186425.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/nexuxapuz.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/30786718852.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/petuvezirarubijep.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/zovedetido.pdfIn PDF document text
    • http://anindecor.pl/files/file/15557788778.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142a39a51eb4---66496367855.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/wutajaxitoxusof.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/jakifidibukagalewob.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/61914ee1d5386a4eac72fb0084ed6bb5/79714022469.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/20118238057.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/44196456278.pdfIn PDF document text
    • https://durimawar.com/contents/files/sexolilegusabuwunipek.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/lodisukosibola.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/34013737793.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3f354b8b4---difabuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=john+maxwell+change+your+world+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_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 19960 bytes
SHA-256: 9b10ae278c1951d8da5193922d3fa43613a57f318aa0867c8ca99ff377c2edb4
font_01_sfnt_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 11104 bytes
SHA-256: 923112026b6738d5f4eb59b4c725a4f9704cd39652231d655968ff2a66d63a39
font_02_sfnt_off00013d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1