Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7b3fb75dfc0688…

MALICIOUS

PDF

84.2 KB Created: 2021-06-14 18:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d9acd61281f95da69a02aa2f2c383118 SHA-1: 7b23ab7e7ebcaa464ec8d5afacfe302ba0a8473a SHA-256: ce7b3fb75dfc0688c5768435c565a30659553425c7eeb4ef845174eb1ee8879d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=word+crush+355 PDF link annotation
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/dfc1cec1a20ae65d80831b35fae10d82/vurewinefodogovomavowi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88985a043.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/n8653asavd0oja597ocfjs33v7/54706064737.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/57609104106.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e92fb98013---5175541935.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/vevn5a7c4on2cpp814ftig35ii/48688114342.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/275974c33dfe9fe0f2825cde5ff35e94/zafilod.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf0631600---favatematafimekafitutum.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785632652a5---tebufesinovoj.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/f2bc43df626f29acb63709caf4508db4/54261412286.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/nerurubodigogekap.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/kanuxatimonusizuda.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7p6p713ct399s05qv3da4gf3fd/90521534676.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06cf78d504---jewurokesaziziwa.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/4d7d414113953ce41457207f57339688/kimodowatarovazotamav.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710516cf65c---27016629711.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/8ht166j6dcohkunek6ldtel5u5/ludiripinowibisilez.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a257ca9d75a---89447560866.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2ae8fe52---18860783048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 2988 bytes
SHA-256: 760c0a150663712d57d2c19c29010c8a75e3c366b291b85e6b756581d637c4ff
font_01_sfnt_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 5084 bytes
SHA-256: 7b44a790809d94d113635a984037001c46511eb6ccb6739655d1737fcb871f1a
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 11752 bytes
SHA-256: 92e3afc9f6ea5b98c79c591cd5e299330dc4d91302ff79d8825b89524b42cacf

Open this report in the interactive analyzer, or submit your own file for analysis.