Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdca34f924ecfbba…

MALICIOUS

PDF

117.6 KB Created: 2021-07-04 01:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba93131a494098a0c663b9f89ec2e7b6 SHA-1: 927f07feb319cbb108a45f8e49b483c433c35098 SHA-256: cdca34f924ecfbba59fa48321d593b3b9d250ae7565a4fb722e4252f73504360
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to numerous compromised WordPress sites, likely intended to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the structure suggests it's designed to redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9653

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://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/12f181e5fe5061536638e644fadeaa0a/89702348681.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/455e0ca21fde27970e5a730b226d4aec/wiforuwixafeb.pdf
    • https://mm-podium.ro/userfiles/file/zusixuboromiwoxonutasis.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160817524ccc72---wimawobizowilez.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/08cdd7e04d9f937c739e840106442a6b/pupunazav.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/sktk8u7uum23gvjc65g8nmf413/66969847699.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078a07a63a92---firakofoziwugupubijax.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/1001c619610e977392ee1631eb9b23ce/5376284480.pdf
    • http://studiotecnicobonoli.com/userfiles/files/96369809629.pdf
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/dujosofizosepijanemavuboj.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba2a811ef3---fifudunugijibivopavixanuv.pdf
    • http://driscollandgibson.com/images/edit_images/file/fikixidofewiv.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb7b3789af---19258601779.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9497a6c242d5976c8fcd9f1810846ee2/roxebonulumiwikogogawipux.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j2ll1p8jr217gu8j1515su20t6/16769690441.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160860b77194ad---4480097431.pdf
    • https://angelsstaff.com/uploads/file/zovufiwisenawifabirud.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/79426446463.pdf
    • http://apluskleaning.com/admin/images/file/vifilafawufolijolawek.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608709e313b2d---87688984769.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818da00b36f---matitegevagovudafof.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/cfae360c50def3116df6139d44d09ae0/65165571176.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/bil41tqagquul9lfi0b66skgjs/linaruribabo.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db5a01ee61e---vibivaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+scrotal
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00018e12.bin
939dc79043d0faea7b66a2a386480f0feccf945cffe50b1e25574550e15674c2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18E12 30136 bytes
font_00_sfnt_off0000fe2d.bin
593bb9ecec525dd998ffe92d53b0c919b9460d15c317385839c8dea657524582		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 32748 bytes
font_01_sfnt_off0001492a.bin
84ee59665f5274e0cfc37967313ad0340256df073f5a74b5be951c5f6a80b307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1492A 6012 bytes
font_02_sfnt_off00015df4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF4 16792 bytes
font_03_sfnt_off0001760b.bin
f761041b1fabe545e1bd88ec6bb7bc16ae14bf7da283930fcc4e444d95503f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1760B 10504 bytes

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