Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba35a5f35026868…

MALICIOUS

PDF

86.9 KB Created: 2021-09-02 00:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52fec959e6691a4b2d479df761f2a67a SHA-1: 2ed7985686d2e0dee3f3f5a1e4e553733e3caa64 SHA-256: 4ba35a5f3502686891138249264f6690321b908aa6ee4f4b792612ebd987aaec
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The presence of these links suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lentes123.com/aym_image/files/12384042206.pdf In PDF document text
    • https://living-stone.lu/userfiles/files/59484843346.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7d74c1897---kapobatakinobitaruzusuwa.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/5ddc90239051dc54e8be9105584fe3d1/82392791339.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/g9gme4i1hi5l14j0p0dunnvap7/81658830942.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118509780c13---xanaduxikavovav.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/latutofa.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160776fecbf5be---livisexufiwajet.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/gakudijijiga.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/pne5dd65rqkta5g9s7h3on22j3/mireweroxedekabidafiza.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/33722186011.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4ddde6c3d3584c73a06e35610fd3fb3/47192281856.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/a6a200217a6e111a673c8647817b8b22/51831495485.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/89756696612.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/febopeweziranojapotubipa.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/98cd5b9528796cec6cbbe04399116746/miweti.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/ccb47fa537200bbb045800f465b58ded/95282297918.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/sovidofefatis.pdfIn PDF document text
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/87325374743.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d3980dfbd---piposananikeresonalekuxes.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/38619963707.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/efdee5edda7f12e21a4ad195ce6dadec/kararotitadajozeramolisuv.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/venuraxitugeleji.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df113a0f95---7662339853.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/mowesezoxamakusoxilerifes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=customer+service+interview+questions+and+answers+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 17260 bytes
SHA-256: 4d8a182f3eae1a9626deff0005e371aa6907876e5c035c845003657acd2f6c37
font_01_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AF 11164 bytes
SHA-256: a39c48bf816cd680b5a1756161a41f3caff50f62eefd1df3d61a03850f6aaf72

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