Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc7b32259c5a1c2…

MALICIOUS

PDF

91.3 KB Created: 2021-08-12 00:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe74dd80f90c976d909cc40584da0754 SHA-1: 47968e36925aa239f28169fbdb58bc63bb68463e SHA-256: fdc7b32259c5a1c2403a5c5e4404c755fde667ccb96c7c8af8d5c862c4933c59
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised or disposable domains, suggesting it is used for phishing or to distribute further malware. The PDF structure and embedded links are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ir6amqshbi2bv05ahj6fvu4nnj/gaduvixo.pdf In PDF document text
    • http://atomleasing.ru/media/File/34832269787.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8abcb974---62648923442.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/67787265167.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4e2d31469---9054385226.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/60878643038.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/koxemobagegisebebave.pdfIn PDF document text
    • http://iwort.de/userfiles/file/89762856680.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/8s82j82u3r93oo145m5c3502h1/11686716963.pdfIn PDF document text
    • https://cargobull.cz/res/file/ruzedokuwatazojemutofaw.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/dolukozewifejegerejiv.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210712221516.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/25c182be988736f5fd575561d1e8595b/56840672039.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/jagewojuruzidinopebemulaz.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ckredpnaipeju67703lhbbnn5o/memuxebivumapigaxipix.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210702135632_j8lget.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8337039b838b261f33ad7efe20c4ab4e/tamuzunan.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/umntjljed5ve091j1bli8vlld2/93719067573.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f90cee0a3---65643087386.pdfIn PDF document text
    • http://freewest.at/punikomoboxatow.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/dejukidewi.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/55592436969.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/26434407939.pdfIn PDF document text
    • http://ridendo.cz/files/file/wusuwigabidofefopaguworaf.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b0ee53d3a---norirobavogesu.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/76m3eiqhk2kbiajsuie5b7hkl4/31170772352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=what+are+some+rare+conditionsPDF 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_off00010288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 10580 bytes
SHA-256: 891d2f75790ec16fc3539bba65d085fbae05e456b794197879d09ef409da2b98
font_01_sfnt_off00011a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8E 17400 bytes
SHA-256: a6be499e3fb026cabcfde3fa23eb5fd2b331cf7017ce9cd51acaaecbf290b755
font_02_sfnt_off000147e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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