Malicious PDF — malware analysis report

Static analysis result for SHA-256 005249abede62f52…

MALICIOUS

PDF

87.7 KB Created: 2021-07-16 10:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 949fde446590c2b01cde2488e9fb62d7 SHA-1: 7437feec3682a5169bd5755bd631ef7a6bd245b6 SHA-256: 005249abede62f52f6e084de03a9bbec1242cd1f010c5ba1db6ed6c738681faf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to lure users into visiting malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://tlumacz-lipno.pl/pdrzewiecki/files/1918316081.pdf In PDF document text
    • http://global-leasing-management.com/uf/file/27863667908.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e83a249c9af199705dd021eae940c041/53363533256.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/rupirawe.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/feriwazakafoziza.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4b783de43b19842a4471f622d8c61b67/43107954802.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/p7ukvqf74p85mlv1h3qh3k989a/68339266483.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9875b9ff9---80953263176.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/dufedewetinatig.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/11934060537.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/wipemilekoginuv.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/xigodagifebejavi.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607f983f4d92c---36306375642.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/sopow.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2947ad4122---47999560983.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/begofifurazezimavi.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/12260114108.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/72163132289.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-10/20210710152010436620.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/43979196638.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/4u6g9lfnm5p2la7vnaoe40gijs/4291309296.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/86044697015.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/lumudexarotogipube.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/13691284590.pdfIn PDF document text
    • http://novichiha.ru/pic/file/38910451343.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac02c91886d---mafitoluv.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f058b3e18---dudewib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=types+of+brush+strokes+in+oil+paintingPDF 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_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 11048 bytes
SHA-256: 61d6585d50bd53efb9ad80fc5f91c866cea91cbf409dbc8265cc9e5f80345a14
font_01_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 17332 bytes
SHA-256: c381a24b12fd5868e8a66c678b090d4628fc90e2aea2da3998e747a64e4d58d6
font_02_sfnt_off0001390f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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