Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fe6a1ae301ebf0…

MALICIOUS

PDF

95.6 KB Created: 2021-06-26 20:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2aef3208cc08ffe8a1af9fc1c7bd2db9 SHA-1: 1de6e2426afe542f7a27b44435394c55727543a8 SHA-256: c6fe6a1ae301ebf0b1696be31dec400bec18f5cb17324ab46973bdf80a58d3a2
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://pixomot.ru/uplcv?utm_term=lemon+battery+science+project+hypothesis PDF link annotation
    • http://rainbowcaterers.in/userfiles/file/39973216172.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/foxomegulasuzazutarejerov.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/jefukekoxuneb.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd3a7dcfd6---85506602573.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/8vguioonbdlb5k7rpur7ti4l04/49793882410.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/26e8ba0d9ae12ce8803b45be3ee00982/babesonas.pdfIn PDF document text
    • http://fittbike.hu/files/file/pakiluni.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2648dcdd---23077286816.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/91231429317.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/makuwune.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/52e4e53c21ef9f8f81161270049ecf47/82453298765.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf6c06bac2---51992888703.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160770a93860e4---feguvalix.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/27q452hqsnvpqh2s10rfh47ka6/nivuzemizitanevufufonot.pdfIn PDF document text
    • http://fotossc.pl/_files/file/71509592836.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ba0542532e8059accf60da83daeafece/nexidemalofudiwitajaw.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/46532166367.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/nabavojir.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e95dd5dad---24856735817.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad862ca504---voxobesonefejemevexuru.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609941d9948b6---96236788986.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/68026777371.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/bajesobeba.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/jegudodipakolovukulof.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/xejuxubulopixefeti.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160add5abce74c---zurulapukiru.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f6575d9b---4165663636.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_off00011363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11363 10936 bytes
SHA-256: e892eb1beb6bbda457afee1fe1c4b5e361d7313358d786986b55db3e6eca7627
font_01_sfnt_off00012c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4D 16600 bytes
SHA-256: b82eaf8b91cfe4a4c92cec18e1cc4a9525dcff45f809146ccce4feff5f259bf7
font_02_sfnt_off0001571d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1