Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd9694fc14c5701…

MALICIOUS

PDF

105.2 KB Created: 2021-07-23 17:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 34aaf8fdd056b0d31acbc8a5e758021c SHA-1: 5aa1ada660b16ed0ddda7ea3c52f4fd2e0edf79c SHA-256: ffd9694fc14c5701a9644a09e8a3392e0cbd75b18259384014aac0804b8ad191
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect the user to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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 http://toastwarenhuis.nl/app/webroot/files/userfiles/files/besusukoxajuvatikazes.pdf In PDF document text
    • https://hissekurban.com/resimler/files/zijixaxosexekix.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/xudikagizuperilamor.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/96571542572.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cef1adae4c---zajojijujesi.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/98186636029.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cedb6bbbdf3---kogevuwetelonux.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/90374277934.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/30795867514.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/83546899265.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b4911b4f3---muvulosago.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/0a810a536c4ef4a253b9e2bee5b26e6c/13190985749.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/nopufawepug.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7561d84ddc322f63aa3ed76e6381e5f7/86587071200.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b5edb129b19---9164977258.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095813b182b8---30695651744.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/ruvetivobuwov.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/runogojani.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/kibudurov.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/2100097531.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078da00ae5d1---banosinagorosopivovu.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/87fa4884c32955e9f9fff30f43f99b48/39444570678.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/52498823644.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/99f9e4ec1cae04851e6e8184b7824b85/29446848221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+restart+pokemon+mastersPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 10444 bytes
SHA-256: 9af09e51724057a8d864bbe49d029962c9422905b906e71c572795ab72e05f1b
font_02_sfnt_off00014983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14983 17520 bytes
SHA-256: 0b192151883ccfb269701420288fd2a584409140824900f9df1fc6e42d9cf72b
font_03_sfnt_off0001763a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1763A 1936 bytes
SHA-256: e3c285d4dfa4c17effb28e52921cb460e05d74567967f74b9fc821ba2efd0aba
font_04_sfnt_off00017f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F35 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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