Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcb210feddbfbf4…

MALICIOUS

PDF

86.9 KB Created: 2021-08-09 20:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c845bd8c6da63495d22d197100c4c69f SHA-1: c6794a6be1a625d1d7f30a03be7460427c96b6aa SHA-256: fdcb210feddbfbf4a41fb8c71aa481e8a72b78a3f102b5343b94a1b164321a08
156 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=assistir+filme+online+comer+rezar+e+amar+legendado PDF link annotation
    • http://ever0036.com/assets/uploads/ckedit/files/20210629035247.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jvrgijouiad3u955c5715c83j1/35661606403.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/73130452427.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/pmm0kpmh7jr99ge4s3snjp0u73/xegoxixaboput.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c39a8648d9---85326513680.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160988e001f565---fibezeturodag.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/38114801119.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/38573706709.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///mevovixepoda.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/65742224642.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/cd4aadf464b89a15ffb9a8709631408f/7760019773.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/102cd6e7e9e992288a444039fc199bfe/letamasax.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/54518441483.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607495b00e7f5---vowif.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd88d680b0---xelujofamusuxipegiwajoxu.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/zunifuxopumiluxoriki.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160767e032156c---ruwuzewefenivabazixegafe.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/donegapudixakosomawebuviz.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/gixudipujilipepisizapuf.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/momapenizir.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608011aa9a2e1---xurozivoxogigofopog.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/23102ae710ba8fbaf989b450021ed696/29725173242.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a1045c55e---81009968410.pdfIn PDF document text
    • https://mihalex.by/files/files/vesorijibim.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/8dheopkkhvbn8a3hklcdgtnnv3/zogolugodafipogorevubepum.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_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 10860 bytes
SHA-256: ba7641bb288368278459fb643ac29acb477304992fbeea000d025f09f3e0ed4c
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 20180 bytes
SHA-256: ecba2a3f2f77080e6e63df6726ee72a09195135d92accb950e9bdb1fbb84db2f
font_02_sfnt_off00013572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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