Malicious PDF — malware analysis report

Static analysis result for SHA-256 2faedb0fc315ad88…

MALICIOUS

PDF

86.6 KB Created: 2021-07-21 06:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e21ea41caa0294e8ad40d15fea90232 SHA-1: 7a09369f81afd9e4716a3a296fefff273aa04920 SHA-256: 2faedb0fc315ad889254e85a5fc623ed4e23db0aec9a3abd03fc5d4ddfdbd51b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on WordPress installations and appear to be part of a link farm. The primary malicious link identified is http://veterinarioassociatopalle.eu/userfiles/files/kuvibarusipozafapatagij.pdf, which is likely intended to deliver a secondary payload or lead to a phishing page. The PDF's structure and link farm indicate a tactic to obscure the true malicious destination and evade initial detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607532cf9f448---regewenot.pdf In PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7e87f18b510b7fb2a74d9e197073d10b/vazota.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7ae6c64f0672beea91e13dae8e65024e/74583596238.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/revibefubewakoxegojikiv.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/kaxazudixakogep.pdfIn PDF document text
    • https://33mobility.net/uploads/files/jujev.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/gaxukuverodopejuzibefi.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/b1512580448395e877ffa132f18bdbe0/mokafivodejolurejewis.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/nudogojiwizojon.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/dorobif.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/kuvibarusipozafapatagij.pdfIn PDF document text
    • http://skupka54.ru/upload/m/bebevegetuxale.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/8abac8070fa398023042e55e9754ed25/272639427.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/keljbpnbo21s9v8c66ingorjt0/79859693375.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/6e0523e52e38f3d0b08e396a9e83a387/vidagamiwaz.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/35489572492.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160823f0d0e028---dukofifofibozojuz.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/53a7714c4b4d6f5788091cf4995dd306/26571591391.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bugidutekowewogu.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f1ddb7f97---gixurogawe.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/39nkmnho7fpihkaeqq6bp7n0v6/71309447346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+do+you+use+format+painter+in+powerpointPDF 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_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 10904 bytes
SHA-256: 5d63b400b612c6842c934d51b66ac9603aee3db6ef901b8b69ab033501987b8d
font_01_sfnt_off000108b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 16988 bytes
SHA-256: 1c151828b3f877e2148b05bc770b1c7dde594a034dddd3112e71406a6fb0d8e8

Open this report in the interactive analyzer, or submit your own file for analysis.