Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6022233273f583…

MALICIOUS

PDF

147.4 KB Created: 2021-07-23 23:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3fbec45fc78e1fc8a75515e550560fd9 SHA-1: 9f7317e2a89e6759662fe00863802273d4894285 SHA-256: 0d6022233273f5839b835db8f4f16af1e409c6627ae68abd1742248d3e52c261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://iviltra.lt/images/files/xamivezamifo.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6cb577d26---sanex.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/10993436795.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd82a205f3---18604244124.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/werekega.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/55685238995.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/slmcqoedsi1se5rb3a53a6hfaf/zanero.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/50634486479.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/33012406162.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2cc293b764---12926343470.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3f368e2b4907da457c9ff9acc8a7c659/78817230683.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fda50e94579a69a9036517fc49b2d44a/39668271434.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/81789312649.pdfIn PDF document text
    • https://ka-base.no/images_content/file/setujidenat.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f26cb416fc---32197138097.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/44126758186.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3639df114d8ec2228570576802c4ec1a/1210996355.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/b1ebfc90c1266bc271caac1e94d0ebd7/38769207459.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4942e2ce8---divexerefemenoloziwerutob.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/lnd9jaghbh0aqag17844v2ghc7/60035141433.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f97a73c9---47023152234.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210704_9497994CE1FCFCD5.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/sadosubilaralagakexofip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cours+amplificateur+op%C3%A9rationnel+pdfPDF 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_off0001db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB9B 11064 bytes
SHA-256: aaaed2aad410abcbfdf0b462d9e86b9ddf7679e3c552d3ab3ee36d6fc3f9fe05
font_01_sfnt_off0001f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F515 19192 bytes
SHA-256: 1055c7ede0cdd974048e6e0f5f47c47657976cb163ddb5b32aad57a282b517f8
font_02_sfnt_off00022519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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