Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bf1e95ebe00fc9…

MALICIOUS

PDF

84.6 KB Created: 2021-06-26 09:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7c0afe915e53ee4308ae5dcb960a1ca1 SHA-1: f2fdbeb9a0b2f01ada2bb1ac40abe7e682cbe9a0 SHA-256: 49bf1e95ebe00fc931d60df64feef19b1488ffaa6f8489a5c0ff72c794ad11a1
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, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=if+else+if+in+sql+stored+procedure PDF link annotation
    • http://cameralehiep.com/hinhanh_fckeditor/file/16811799820.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c339aff78---kijolifar.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/favomizedonasewinegalom.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093d406b890c---voxafaso.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d639a4c5e58e2d06bbfafe8f9b38f62e/85714894993.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/nodut.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/484ce57debb00c8347008cd15053d3b5/74183614691.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/garux.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ba0f4f9733edd80dde41afaf57a61731/24778667725.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/77185096983.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160725f0f7a2eb---gazane.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa3d3c5be---rerunipiwirilaselelibum.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/5a55e4b4cc9b8621635f371b7b81a265/81300621739.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/e36b3db5db1da0ccf91de51d299b362f/niwezujefebironabarabe.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f5c81f208e5c47208830af96b22b65f7/tepujevakigedoxazimiju.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/845bd0dc60d6aa2b93411e18ba0a1140/40128618776.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/694440f60b6a01ba81f9501942932477/99486617053.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/rp3v3bqul5ckj1kesnpv0fhn70/zulelezomid.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/27109228155.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/222f4c8d0428e8a7272217f154e9c097/85930148731.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba126430c4---652014858.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/segileso.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/46224725769.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/e73vgs87iisq906lvnu0m8m942/65702229814.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607573d265ea7---gozixinup.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_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 10648 bytes
SHA-256: 581153ae6248d3bff2c6280962e6d8fe9364e72908cfe0fd220af1aa1ee5876e
font_01_sfnt_off0000f3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 27036 bytes
SHA-256: d8fa697f4df4b4e1117d676df03dd8584035bf0e4832ab9a3260af2751504d8c
font_02_sfnt_off00012cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1