Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0f68d66cd98824…

MALICIOUS

PDF

85.2 KB Created: 2021-07-06 19:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1ba6e178b3ae237c0d070b78b1343a4f SHA-1: 7d2eae48008155f90368529068428fa24a2a5183 SHA-256: 7e0f68d66cd9882484f34df4a84eb8cf20b111de6d912319da72b7a61b4aa930
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous URLs pointing to potentially compromised websites, including one hosted on a compromised CMS upload storage. The primary purpose appears to be directing users to external, malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://b2cexpressdemo.com/userfiles/file/boniwokodojodabavezebap.pdf In PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/lepegujedakivexivib.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/8816020896.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/43642800909.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/bokog.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/vuwenuzofodatoxotize.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/48698832432.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4b609cc5b---sevitezo.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/fanewuri.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f122b2ad9d---64809463322.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971c10a3b8e---xexukunefovadari.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-1/20210601234259708453.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/au7gtdilh3b4cpdvkaouq6qch1/kubopi.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608513f8665d4---34209975309.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/5529001232e3dfe3f3a3656dfe749213/9135070330.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481686cb76---94217370791.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/4adc88e7fabf9af0c0ab0c570d33bd54/jugukedaferituz.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/nugojuxelonuwator.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c0039a51e---75359050196.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/86653486639.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b07f1286daae1484ff4a1ed7a798a052/tatidu.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608930983a8ad---lazav.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/b48oif4dqi2eegq09155llpr61/59520183864.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aed658b6da4---jukibugubi.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/87240411240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+many+kb+is+in+one+mbPDF 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_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 10448 bytes
SHA-256: 12321456950342050a20077e7244f5b46fd467b5216162cfce97fbe0ee6d07f4
font_02_sfnt_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 16524 bytes
SHA-256: 333779f79e819ad30e903cc6cbbe81367afc8af3660c552b6e442db36c378ee6

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