Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc294f6cf4e32194…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 01:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8ab9038c0c45f33a1f80fdc2d1dd58ad SHA-1: ec713138c76b3433a8f6e1ea3faf60850ba67559 SHA-256: fc294f6cf4e32194df45b4a7320bc6ba0d9815a418c7147686843a5b1ece328f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://karmand24.ir/basefile/ehotel724ir/files/70141282287.pdf In PDF document text
    • http://ddaengshop.com/ckupload/files/kanexitodekaxulabinowob.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/jerigufujadov.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16093da30598e9---zowuviweruwutubavidu.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/xeroligepu.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/99866308237.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607220ea9cef7---16717499196.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/88464199952.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105bbb0e8a13---28652744289.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/023ddb60c745c035e13b29318dd21b22/posimonodeziwapini.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ae522147---2850930102.pdfIn PDF document text
    • http://planetamama.ru/files/file/pubodawekaxo.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/razukudotuvojagadunopeda.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/dawijadi.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c79f7b8f7c5f0eda026acc1b48d54bb7/35616643939.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/42539367867.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/77667598163.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/misimovud.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/ed1c469f941e942ae919969d99f5c8e8/fijexadegegokafesibumob.pdfIn PDF document text
    • https://kham.vn/userfiles/file/zejurejozefevafof.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/jakenunomabagesa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/99n8f18vi01a8aq504es22fkb2/18135053531.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/57141189982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pdf+previewer+for+windows+8PDF 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_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF384 10544 bytes
SHA-256: a1463e0674dbd47f98b5da428e7454ec4ca69ae95c1a489320d016b76c1d3e1c
font_02_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 18044 bytes
SHA-256: 2726213c8ea5bcf32966db4abf4c80e9465a4133ce6d73c4923c04536ead9b4b

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