Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e00006d04b0edc…

MALICIOUS

PDF

90.1 KB Created: 2021-07-14 01:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 628ccfcc9cab832720b68216b4ffeed9 SHA-1: 97ba9860cb03e427c6bff4bc1d32a1926d1cf6a0 SHA-256: e6e00006d04b0edcb3635d6d1f7a2f3102416d0d7a909a466f773410fe9a4299
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF functions as a link farm, with many external URIs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chptravel.ir/data/file/31581738508.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160745635a7f51---taxawopekovesogupujesap.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1623663786.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3ca6036c786cea34c36578036ad6e0c8/xejavinesexurisavokodusef.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f603d73438bacba2ca03e47642473b52/86079432130.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/144h1b9fthf9q4ppkaf2552jpg/teworunikibapibujumider.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7691b28f---biraxaregonof.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/5226593362.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3acce7cf---84863531399.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210520235927.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607262c590db9---tomonivatelasoki.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/kevilafakisidudoda.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/32199945761.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/rcpfm3j3v1d776v410pdi0n28c/52941501457.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/68422306564.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc88e1caed7---sutanipipipufigonimepog.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210603_104628_8776.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/62529988324.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/gopitelixiku.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/miwepuxinufi.pdfIn PDF document text
    • http://ubest.ru/images/file/vogolozovafuduvu.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/7eb59e4d96b6ea9b3e40a8e85b2f8c95/viduzimelabomumin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=extemporaneous+example+situationPDF 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_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 10600 bytes
SHA-256: 14dac629f84dcdbe5a49c909df63b968a1b0396d177741dad99ae64eee071b36
font_01_sfnt_off00011810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11810 16768 bytes
SHA-256: 7f8ce24f6820466b8d773af9a561f758daa40b93245e42dcee649f5d0022e4c9
font_02_sfnt_off0001432a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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