Malicious PDF — malware analysis report

Static analysis result for SHA-256 264dd0e2ea0b90dc…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 11:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 631fe8a13fc894ba2577c89837d55733 SHA-1: d605ef1d3e2e49ddb93953aa9f88feb2c2286ee8 SHA-256: 264dd0e2ea0b90dca9e3ac20b1ba671d9b5c433aee6d31a519627b5ed93b831e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are part of a strategy to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608188511074a---33021869991.pdf In PDF document text
    • http://euro-ex.net/images/blog//file/35645750677.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d77b0ff04---72344399191.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/fc8b16aa4ab838b8bd1bafb355c4fbfe/22301229732.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/zaxapixujanumekofub.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dopopatetejamu.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8ba9f958---ferenelikewanijekebosez.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4cd46205b---kevozibuxidigafowev.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b927964b280---favatiwotames.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfd78c1d2---92338350356.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/52bf94b9087d6bf6df57d5a3fa89ed67/jawaxezofopitowane.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/1007997696.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/bfe6a2a5fb1220439de8265454eb972c/sonataxaluxiboregizovet.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094b024814ca---saromudafoxegodudeleru.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e860aa17484c5faa9b9a4f0fb1638a58/nuzalekagotowuzekowate.pdfIn PDF document text
    • http://blueyee.com/upload/file/012038475897.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/83081927189.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/59092797607.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fdc70dd7dbad21129dd7dc5eed5b01d0/69640760320.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021062107260773499.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16093adc4e0a28---51612659308.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/vixojiwusawinibikenafo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d510df19ab---30944278795.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3330daf4---49893670501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cool+fancy+text+generator+homePDF 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 10768 bytes
SHA-256: 4b1fef54d72c1bca7f55315aa686c211d193e891726aba04f32687c21c907cff
font_01_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 16800 bytes
SHA-256: aea492ab8a64c0ba2861630ec85e6eab1d229045ff86df755ca23d13b47aac59
font_02_sfnt_off0001373f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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