Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc1984dbfbf244d…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 03:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a174a5c936c8ffaf640b0793f2264728 SHA-1: 9b4250b241100edef991d7d50e4499e66085194c SHA-256: 4cc1984dbfbf244d21dd757fa49ba9d90942fce69c468092fdaeb579c0e389b2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to download further malware. The file's structure and numerous external links suggest it functions as a link farm for distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1f4e78d3333d47e03593292287f6d365/nebujodivivagi.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9209358539---zererilizijarol.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vo8rbqblg5fj1almsbi8089p4s/lotinojavanazikuferesofot.pdf
    • https://cgeminfos.ma/upload/file/waluxebeduxobutegizog.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030f237740---wiberomuzalel.pdf
    • http://akkoryazilim.com/userfiles/file/96139238748.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/72a6888a029cc2acc5e7fda4c5bfb57f/xepituwuputejakixeno.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/e27fa969f4511078a5aeba342f883f2a/noxofafepozoxasigin.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10abae78b3---6407744203.pdf
    • https://arhometutor.com/userfiles/file/nupabukexod.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/r6qd4c6ad1ddna6qgsq4oaqjf6/riwuvigofumagudolabarew.pdf
    • http://edu-family72.ru/content/images/uploads/file/85595641047.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160886b6fbb843---lepamixarumexarovatesam.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085caf491b08---6987101037.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d8eb9cda---84315178028.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/123ff0714a6e5116ce0d9e7aa6c00e7b/xalumazoxe.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081da8d58b92---64200038493.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/92p48thbed3j1oblgrgf5fcqs1/68205904603.pdf
    • http://stalmost.pl/userfiles/file/wujazekolagare.pdf
    • http://soft-pro.hr/upload/datoteke/82736870402.pdf
    • https://feng-shuiworld.com/userfiles/file/23098553926.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/d1t59jpsfk0gvq6hue2npu95t4/poxifutilorefix.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160805dbdb4433---73356021284.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5901842dc---fibumonamumoxupixojuw.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3da65ma64ghe1tpjsitre3ak02/ledetidoxilusu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=get+a+half+life+lab+answers
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacb.bin
acb7dad23c089ca30223232e9c3923b3507ef734236f331a7dcc7b7338e95172		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 10456 bytes
font_01_sfnt_off00010284.bin
a0bd375f663297dd26d1b34ec9f7cbf85d2241aa94202cb48e731dd151b04fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 17796 bytes
font_02_sfnt_off000131ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 16792 bytes

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