Malicious PDF — malware analysis report

Static analysis result for SHA-256 4546aaa83cf868f0…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 14:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 67f53f27f6ca857c93bf027d8f1355ee SHA-1: b39a9b2655d0048ed52b186d1a8164ad4f7fc070 SHA-256: 4546aaa83cf868f0b6400c365d3c8377b9562039674becb3eafb84c33b4358d6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress sites and disposable hosting indicates a link farm designed to redirect users to malicious content. The primary goal appears to be phishing or malware distribution through these indirect links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://bataretak.com/img/files/file/nilixo.pdf In PDF document text
    • https://drrajanmahtani.com/userfiles/files/58193124384.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/janujisatabotaxefive.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/8508a8c6bb8be5dd1d0c42da35bb0c71/kaxufofi.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/56637803871.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b092fce7500---rodoxipejisapiwipunof.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e7e7c32f05c6382e98589af3773aa150/23548338199.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/a54b57d9eef95c368ea3bb97d595a96a/20003103825.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/7560195742.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/16542938318.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1611a72fc67747---25089418284.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/24e4e4babca1489131c67395ff94b4c6/pugaporasudodofewe.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f24c9bc41948c5b40d900df174834d8d/24446585400.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/51574928831.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/15857523137.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d43b2b3a79---guwefekawelodozuzun.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/gorozogexilemapejas.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/8eekj0m8kn7spam5c7gpph1shf/47023287653.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/18178816451.pdfIn PDF document text
    • http://produccionesproezas.com/clients/2/28/28ea8f13eb032e89cab2838ec144e7af/File/fidujanizegulurir.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14f7b35f9---21571081573.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/zeriwurimovejow.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bf4162b08ee---wubamilijumudozapa.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/23830815310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=surgical+anatomy+book+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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 17372 bytes
SHA-256: 2dfe13d20cf3c2a29e47c56cf57bbc20f0d1b3810d3fdfbf6e475d7afe3c4cea
font_02_sfnt_off00012830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12830 11184 bytes
SHA-256: 0905a6093e71aa53f5eb04ea149483cdfbde106831bc06c1beba8ac66bbc5004

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