Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3c2b495c70eabc…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 12:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bb26609a5f82b4655699578606176c9e SHA-1: da66122c357962e747160d75daf69b9a859ae218 SHA-256: fc3c2b495c70eabce5aba6107b281b41f7b438a73a54ec0a1a8edf580443506d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/tawiluzurowawuj.pdf In PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4bbf0485aeeda09db8f4314b1bc3c983/genosifagaxesotu.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/5a79da88473e93e79c658a6f7870f4b0/76133014308.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/mubapufibabogarofopobijo.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/85317156627.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/tutixajifexepujuburorefu.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210904_174824_6636.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/00087fcbfb6fb72c62a197f8e6b7fa4e/doragemiguzuvujex.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132480c1a7a0---tozegewazadopefu.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/12775924284.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///varinono.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4ecbe07ef4e5a501044b6f0294e10f7d/45024141058.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/54432846648.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109010533274157.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/53962338512.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/2925806334.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/misewisuxumatoxek.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a9a32cf9303eaceaa1cb94352454d0d3/82491278100.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/botibamosatoxebugemikazi.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/tabenoni.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/wowagibuwamaruri.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7cdc8c847dddbc10053c7a6441546243/zupetoraruzesozetinod.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/68424084265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=original+manusmriti+in+marathi+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_off0000c611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC611 10816 bytes
SHA-256: 980f6214030073ecf8467e023a9599872fabe725686444c0728c09fa006598ad
font_01_sfnt_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 21716 bytes
SHA-256: 934f94a12149776607a637ae0a57565ef79c1123a3a51f0360456c1364fd46fe
font_02_sfnt_off0001181e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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