Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3e82ab5ca4a047…

MALICIOUS

PDF

107.3 KB Created: 2021-06-10 16:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ed42e35ded1048a3ab090ace43c2cd18 SHA-1: b7a27605f9aed5e5e7cfee8181a9d183d01e5786 SHA-256: be3e82ab5ca4a047dede4cc34610f22f978923cb4fdfe6570cdf4e2fe2c00385
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations hosting PDF files. The document body, though heavily obfuscated, suggests a lure for free PDF downloads, aligning with phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cructi.ru/uplcv?utm_term=bhagavad+gita+as+it+is+marathi+pdf+free+download PDF link annotation
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/7bmq83e804n87pk93p3v9gejko/fatovu.pdfIn PDF document text
    • http://charivne.info/images/file/fiwarerewarevoxegajivajex.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc80d1306b---11532045332.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160819d4738c95---sanogemitipenulaj.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095abad1fff3---50588827528.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/nakiz.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44fedf7aa---20427775200.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/f9b8836075a624428a5ff56b6f357381/36164119116.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607af5e5bca42---5142235492.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a64e8f49aff---33024419374.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6e1124d968216d3b1d147b8522ef1b8e/divawirewivefefok.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/notnqqjthm4e919h3kpq6nvo1o/xazigemijitekufogebik.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/9328d0d76032edab9b452a127341d0ed/xeworatariwuginuwepuwizow.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083077bbe3e0---64426992838.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/6f50bd3a9461f8767981d9b2fc395f62/72862398608.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/pqugsmuqu06h07kqhaj5dc3ad2/sezimuturafamonugu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vpik4he8av5p1jsr1lptjstj37/durezenetabarimirajubatin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 5656 bytes
SHA-256: ea86642b95f2722f69dd3cac40a92383c9b11ac278497d02ece3a6dc6ebea074
font_01_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 26364 bytes
SHA-256: e78670820aaffce7d66afa144207f56a8bfad5a7b8bf03be38c3f6d51f55e75a
font_02_sfnt_off00013862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13862 8756 bytes
SHA-256: 42d47263d7f2045b1201d5caacf1fbdbb40e190cfe90dbadb3d94cc1d870012f
font_03_sfnt_off000157eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157EB 11472 bytes
SHA-256: ebac5c26c91b28d7824006306c89dc7ae1a4be6629f03e0eac2fc1068b900e19
font_04_sfnt_off00017f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F3F 9440 bytes
SHA-256: e82c2862dfec980d75d8ea3fabbcb416a567d40a50e93de90b35f618f512c4d7

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