Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ca1395ef21ccbf…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 17:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 39a99fafda23e1c99ede3188c909c67f SHA-1: 56e7a8e1121a4589cca1ca79d4a6e65345dc168f SHA-256: 96ca1395ef21ccbfdc3f849e70dfeb96c40295ffdb5d7a54ffa1516123845c87
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 compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://uzmanwebci.com/calisma2/files/uploads/461189366.pdf In PDF document text
    • http://agppi99.pretty-match.com/upload/files/modenonibizupuwika.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/28992959536.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/kuraparujemuvokarivori.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/2026349632.pdfIn PDF document text
    • http://didopack.com/files/bulogofotasivir.pdfIn PDF document text
    • http://195exim.com/datas/files/jerelatopunifotanavegez.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/rapogapu.pdfIn PDF document text
    • http://goref.ru/files/file/51134327222.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/63495869094.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab04613b45---64417159501.pdfIn PDF document text
    • http://maulich.vn/attachment/files/rapidipuxurojozuka.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/4342466864.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/31272484762.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/44935037103.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/72470251032.pdfIn PDF document text
    • http://master-vin.ru/files/file/91610172452.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/rigelewuvamonarigi.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/40399305953.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412fad7d0f5---venosizarezat.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/jipul.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/81907178003.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613578b966272---voziwofer.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2f53faa2214fb8752799eee6cb7ebc63/mezebumexeguxo.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/13871233973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lens+app+for+androidPDF 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_off0000bce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE3 10304 bytes
SHA-256: 7fd90006f751c210f7e68faa721b88b273182fd9a92141338f533bade0a595c9
font_01_sfnt_off0000d42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 16060 bytes
SHA-256: ef5c9e98789c5b149f62393c1f1e75da2d5d40d994c87dcf22346dc3bc3f44d3

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