Malicious PDF — malware analysis report

Static analysis result for SHA-256 1366516a1c58bbf7…

MALICIOUS

PDF

86.1 KB Created: 2021-07-14 06:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a2fd82d6849a902409525fb9362fe65c SHA-1: 5eebec66701c9e44e1f7ee0c5d82dd59241f26bf SHA-256: 1366516a1c58bbf7ef6e2a250849b11c1c39187de82139460f6da479274f03fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ladyvenus.it/userfiles/files/xuzagedoxukagelupe.pdf In PDF document text
    • http://royalproductsonline.com/userfiles/file/moforemufixabujovose.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/wedazu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/afjhomiphndk87jdna1g44vht4/vajez.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622436769.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/waxawigani.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/denekogudev.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/il7qlv08m836bggtns1cgll8cv/bejaragiva.pdfIn PDF document text
    • https://haidangpc.com/contents/files/ligetotexeva.pdfIn PDF document text
    • http://collegedelunion.com/clients/76066/File/68768874594.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/64454521863.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/c1df61ab798a80dd69713498dd5cafd2/girosameboxolavokirobeger.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7eff05a2---wujanasenavosasanif.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/4842489984.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/genebasojefumilexofil.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/6499507401.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/govawigopikuzupesabugima.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826ff977ebe---96833209829.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba32237d82f---tapaziragugasaganu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef81e16afb---lenaxopimubusamat.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/fc65b343d2c1b169a687a3c507a5fcc1/36518791403.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/guwigukefulomasigurol.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/mimojunagixuselaw.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/jusofovegiwetedavuxodiduv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pins+and+needles+entire+bodyPDF 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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 10496 bytes
SHA-256: b5730aa74448445e99ae7cbf6aeb3d6b54a8859298aff246ef1c6921712a0fa3
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 17884 bytes
SHA-256: 44983eaa4bb5dce3426160600bfbe97edee8a3c5bddaac0f0b9943f1be76686d
font_02_sfnt_off0001331f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1