Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7206936a15f307…

MALICIOUS

PDF

104.5 KB Created: 2021-08-14 20:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4e3ec2afb2545daa5d9477e94a015675 SHA-1: 40d14ed284cfb422c60e4fbed3fbc48a6d6723a4 SHA-256: be7206936a15f307f05ad8dbd421c0ad020dc95c5c2881e697435622fff7750b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other unknown domains, likely for phishing or malware distribution. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this is a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6d1db5950dedb543afbca14aee79214a/24842582387.pdf In PDF document text
    • http://dr-onesrl.com/userfiles/files/16428747182.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/407q7nunutks3kcjm72qnrjj33/70037001629.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/xuluxe.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/cf38a1438e1bb0916648d8a69871a80e/21506339531.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/32537476078.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/rudageja.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210530054420.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/23073603483.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/18352425909.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608427d2216bc---juzagojarasujopi.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/basuzumuzes.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afdac2501be---danupekodupem.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/wetokininuv.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-18/20210518001124528231.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/xetavenabajubewa.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/86407881812.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/rorumalemezagokudinebasip.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/23982307334.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/70dfrhv5ah9bf0u1p4kpe0eda3/kubetesuterabenesixifito.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090d193db20c---fudiwe.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/8a8ea0f2937784658e35ebc305210f51/59804660916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+many+types+of+volumetric+titrationPDF 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_off00013133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13133 11000 bytes
SHA-256: e63f241228385b22d52dea6e0ff7b5514059c024807eefc6d850bb56afbc8a48
font_01_sfnt_off00014ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACE 18976 bytes
SHA-256: 11bb9c9ed0a42bf08c9474835d0572700a8b681fea34a63ca17983be7dcb1274
font_02_sfnt_off00017b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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