Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e864732d898d982…

MALICIOUS

PDF

94.3 KB Created: 2021-07-27 23:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d33c991c134ce345cf72a4dc3f4f24be SHA-1: bff8078a665de0a839cc8118d201ebd79af6d75c SHA-256: 0e864732d898d982a2d0850b47c2d389afa1a351fb238ab27cae2a9603c6caa3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised CMS uploads and disposable hosting, combined with a 'download button' heuristic, suggests a phishing or scam lure designed to trick users into downloading further malicious content. No scripts were extracted, but the overall structure points to a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://carszana.com/image/upload/File/pogimukis.pdf In PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/5e5da950de8b0a3fe5a4bd7c6b0a3c64/52255703121.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/barejedemojunisesubokon.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/37247563538.pdfIn PDF document text
    • http://zzquansu.cn/d/files/laxadazezigabokijup.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ir1jrlj9avgbokel0j65ajrr9s/jitifogadarojarofowu.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/19023877239.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8b72a8ed05f2737bd05f60f3d139d9d3/28410390915.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/78142244705.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/snj5669gqndqg2jq6lv9amc4hk/80505017663.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1155556865---29449068259.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/53406222125.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/batanume.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210726_1BFB652ED5E2AA1D.pdfIn PDF document text
    • https://rcot.org/userfiles/file/lixerubovovidiwu.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///23446872071.pdfIn PDF document text
    • http://afslab.asia/upload/files/mitudabosoxixuz.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160e67df5e9c13---20662019874.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/poriziduzaletobobedif.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/041003691c8f9ee0a3762350f10dcbfa/rifazu.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e9b0b69c0---91631025088.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/0m7hov33l0t0m4kdp7tune706u/57763355875.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/wafosifunudupigusiz.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/wolujebinugas.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210617_048c6.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/cd1c9471adad4f4afc0d65e8fe1ae60d/digibosoxuvil.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8e67eca0a62c8532851c2ce11d021123/12441174755.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beac8b8bb8d---54915158607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=basic+tailoring+books+in+tamil+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_off000109a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A1 11116 bytes
SHA-256: 55ad7f640d981f76ac0aa765866433d14c91537209e83ad756cd73995c329df4
font_01_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3C 17088 bytes
SHA-256: 3a782f6eee0e1af7f35b37ebf48974324a873620b6505dbd37e0106ce9445e6b

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