Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee64f6e42e03598…

MALICIOUS

PDF

107.3 KB Created: 2021-09-03 19:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b28a8a1790fb3a1cf467982b7ad89a0 SHA-1: 67a790aa12700fa425f09eae9ad55a19247a3220 SHA-256: dee64f6e42e03598153267a8c39fa7eb8c0cce06e046dd9a75dd9d67e0be5dd8
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, and the document body was unreadable binary data.

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 https://catamma.ru/uplcv?utm_term=hyosung+atm+service+manual PDF link annotation
    • http://dentalclinicbangalore.com/uploads/70094108137.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44e9c217cd---43884589546.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/wumufekafizoj.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/50f7c29ef89755b09980a76631142ba0/lozenipab.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/67813068061.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/59cb7214d887b7d78b2ae364fbc456f9/bagesizojekeginowo.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/16647705342.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/kodamoniwotufom.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/54247462726.pdfIn PDF document text
    • http://vodnik48.ru/content/file/89585174266.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/11632107287.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/sumerudaletolanesewajavet.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/39907870466.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873e4e0a0ab---29974021949.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/luvepivivizagufigasuvit.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/fojekekajezotolezorimi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2efc5179---22368729593.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/112112e6940f928c143e636d3edae6fc/rozerevibumifuvokibo.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/muxavinevorudowuman.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/nefitotuxusebamererexe.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/zadavaseben.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/golakijivamepapezu.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e11411862---rawaresilefag.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cf7ac1e87---mamokaresexedikugen.pdfIn PDF document text
    • 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_off00013a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A69 19176 bytes
SHA-256: 3b696bb95f232871d2a7a112f66a83c6fb5e130e227700732ef726921df55d03
font_01_sfnt_off00016cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF2 10844 bytes
SHA-256: 29a0edc5d16ed1deb43aacc8911445fc04a2c6c9aa4cfc1daec1aefb5ffff6fd
font_02_sfnt_off000185ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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