Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba823f0e6e6e7970…

MALICIOUS

PDF

109.8 KB Created: 2021-09-07 02:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bcc89a46e5a7ec31915d5bb6e35ec2b6 SHA-1: f5c66a9241a987f753e77b4268fd5171fcb0abb5 SHA-256: ba823f0e6e6e7970b1ecdc88b38090fecc76e0da37af70f03a1fca44cc6b4981
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to lure users into downloading further malware or engaging in phishing activities. The presence of multiple links on compromised CMS uploads and disposable hosting reinforces its role as a distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://tragiaocolamsapa.com/userfiles/image/file/23979801878.pdf In PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57644626569.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/penajedepa.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/94937765636.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/bipisa.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/c666d55a7b7af97b0103cd6a9be870f4/bewitebek.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/65528824319.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080309f45384---29005579978.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/995083a46683cd5c5fb65bbebef36b02/nukogisupawe.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/tetajobubuxaduremesagag.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/15998914424.pdfIn PDF document text
    • https://edusfera.pl/upload/file/fenumikuluve.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e92aa3112de9bd2282d40d495df8911c/32156308401.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/9joe0eqpj1r080c7fg616g22i6/69370794649.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/bezepezewujonan.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/wekoxixuduga.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29ffc613a---pijifad.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/jd3uo356os9a9ocku9dmiu7jso/77608676394.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca02849bc40---xerenawik.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/79613906170.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///tawagowogare.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/sovuvupuxa.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/7bff1631f816c4243e752a2c46a4966c/lixozujalup.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/94041869154.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1bf4a78cf---1676060097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=water+purification+methods+pdf+downloadPDF 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_off0001439a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439A 19968 bytes
SHA-256: 9d019b4df6daeb11963182120ba75261b41ef16014496acc317f172ae010578a
font_01_sfnt_off0001774f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F66 11064 bytes
SHA-256: ff9221568d211a7ef5512bc162192b248a1f85aa9008e25b75a8af78752b8ca3