Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f2ed1e14e696fd…

MALICIOUS

PDF

77.5 KB Created: 2021-08-27 17:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dccab9599a6bc9b097852dfd3af45ab4 SHA-1: 7a4e3976383975167061d00ef82bbb8648f4a64c SHA-256: d0f2ed1e14e696fd606362a9557eeb24013de708b5b0bfdffff4e196e46e854a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are hosted on disposable domains, indicating a link farm designed to redirect users. 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 0.9997

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=water+and+acid+reflux PDF link annotation
    • https://asset-books.com/userfiles/file/23660868248.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/17713269829.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/47981865008.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/boxitixag.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/vuvojujegujoraruwa.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/66469420696.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1d53749256481afca152ceef53403cee/gosuxefogamelikogavune.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/24347538011.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/97a4b04f3ed07f5a552b06a1017ba336/guzisonowo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3513ac101---gikovon.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/podirovosabifaf.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116de13621c3---46203588964.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3815114a62---tuvexer.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/53073157399.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612698288876b---20270313208.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a07359447---23768306085.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/xupikigasoxeso.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/77861620114.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0d7938d18590f7a9ef0d0ceae48bfdf3/lividufomaxizowofulaja.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/pesebozibezilapaluf.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_off0000cc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 17224 bytes
SHA-256: 024df205fd326200569e5fc2cfeb8fdf8acc3cb0d0fa57aab71135105cb30188
font_01_sfnt_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 10376 bytes
SHA-256: 884879aa144d8aa3f3192f110a45903a1ceeffb7b079dcbb2916380a82d00e92

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