Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea4b34010b5c1aa…

MALICIOUS

PDF

82.7 KB Created: 2021-08-23 19:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1dd1bfc3bd08e52a7cb0c32043c3b518 SHA-1: 007a2546dc9e1ac6060b42ba216ce0fb858ccd4d SHA-256: eea4b34010b5c1aa1c0a9688b5881b9e26b64f014f8bdf221575e388b7f30dc9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high probability of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt at SEO manipulation or tracking. The overall structure and the nature of the linked sites point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://synerhu.ru/uplcv?utm_term=how+to+get+swiftness+100+in+minecraft PDF link annotation
    • https://topinsolventa.ro/userfiles/file/ganatezirifakiwinepujiduz.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/sopazekovopavodogetixuko.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/61277070224.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/89085541932.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jojetanutelubewamomifiluf.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b87b935e55---mijemevajunovawojodurir.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/wovuzosedoguvalar.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/rbr1qdriauv2insv71280oh6i9/15539938671.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b56789954c---somozinoji.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/32226068744.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f1f722e9455---vusuxutuvagimiwopazudifaj.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/waxotugejebejivovixo.pdfIn PDF document text
    • http://exosushi.com/uploads/files/44660987008.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e4872270217b4863cbf53253f22b2bb0/96029967477.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/xenuvirixoxavoxumekepaf.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/41164257243.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/30005903044.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/bgc8v41dmvqgil7veje8cv6u86/binozuleniminiruguniziw.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/sokaboxelovewefux.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/19295712525.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/4509858527.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e090a5bb59b---lazori.pdfIn PDF document text
    • 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_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 16660 bytes
SHA-256: cc3ea21978f45d1eaab1cf134da51ac8d5783f249ae1f89418f197a7aebccd03
font_02_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 10884 bytes
SHA-256: 51b7e531794e78d605af561ab6c5e08004564b8ec164ba66c0cd2f179d7c4330

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