Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64ea770933ae546…

MALICIOUS

PDF

88.3 KB Created: 2021-07-23 06:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d799fb1bd5966aa286b518967c780b3c SHA-1: 0e47fd412bea8d966ec9bbd441dbe403044748b5 SHA-256: e64ea770933ae546dec38a54dfe13d37c6cd17ef4cfc9d7d9db3ee4adb738495
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l3qgbc3quk9896pstt22k4nsrr/85871415442.pdf In PDF document text
    • https://villatoscana-pi.it/userfiles/file/67007774924.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be942566e---25730214982.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/nokepudulirutokixuva.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9afbe2dd7---2325958549.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/neguzumawokegadebokasap.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/f95a241b3e36a0b5033f3a5b4b80699b/badadofunulifurubedof.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1bcc5130f---95136207907.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/gimaxosipofanugipapibave.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/4640474512.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/1733644556.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-28/20210428222924431620.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/56737916373.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/938384161615a49abc55777644ccdf44/87466767713.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/35300814954.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/ir1q4p8eslgeb7slkhv532oeqj/dekonikavokiwaxabupofobi.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/498978ec729eef8e733a09927f08cdde/jefifetotidim.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd5a794045---13065611019.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/kemenusilo.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/16972278566.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a4bd99c662db4fca0e13d6dd6af0d436/43458576831.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/nujesinabogo.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6cdvkb2oo1fqp70rdr40clbo85/79847726866.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa3e340b6---puson.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/63873564969.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/lujenavadaduxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cheek+lined+wrassePDF 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_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 10336 bytes
SHA-256: 2aad830372b1ffb7344a74157eaf7855287bf23e67b51d60967d1a2b52b5a403
font_01_sfnt_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 17628 bytes
SHA-256: 95245ad2449e734c007bce0f47b66cbe2bca656bebd8978539a3181b211b4a4c
font_02_sfnt_off00013a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1