Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd49208dccfad2d…

MALICIOUS

PDF

90.8 KB Created: 2021-06-29 23:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 59a0d0f4edb1a016a5212ec46bac9e25 SHA-1: 2dd48b97ece785d5ffa605d7423e19430b7b3243 SHA-256: 2cd49208dccfad2d39fb1b9fc1e8e93965091fb8716afe30cc3e3050b80f584c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content or phishing lures. The presence of external URIs and link farms suggests an attempt to redirect the user to a malicious destination, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://angel-juicer.com/FileData/ckfinder/files/20210626_B4D1E10549C229B2.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f5052cd57---vulosarirewalivedonapepa.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/saxujaxinoluwosad.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b7b559210---39888172371.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/49631256e7fcc576b98664debc18b329/pavorumole.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3grmsg1hvo6tsrhmtaddaflq2d/78806199977.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/65ba94607d81ef149597e2689ba6f55d/50697905925.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d6a5f2607be1c5750083c6ed2beed841/19471632165.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/saxezeropidisono.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bd6d89b6210ead67a1377cb477b18309/3240285194.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/87481926149.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/23198897101.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/3068824905.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/34582808452.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16084a477e2f92---votamumofixabizigoledo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9cd033c9c9e18d5d7a36ec79de039267/buzowelutoxafono.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900e3708dd1---78187878451.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/96073748554.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5c949e084d49d87a0066e8b377c565eb/pexosisajunozibe.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/zasimodelumiripetuv.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d9e806084d6ed02c3f34800cee16ab4e/wijajemizava.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c02b9581d3---161396106.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/30ab49644129a2d5dc28609fa4731c35/rizevapavukasarosuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nuclear+fission+equationPDF 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_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 18268 bytes
SHA-256: 4045e0a1b30aa3f7bf60a8b8b42d622ccb13f3af913c845f67d3a59f98c5ff80
font_01_sfnt_off00012de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE3 10552 bytes
SHA-256: 6236b51d2cd90400d0e58c48ced956007600b1ceacd5c1d919e2ae622b867ce2
font_02_sfnt_off00014618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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