Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac2307b4a7b3eff…

MALICIOUS

PDF

82.3 KB Created: 2021-09-23 01:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 896f5f5e6aa73b4bddf7bfce67b88699 SHA-1: a4e72e1cf9d4e804f02f9bbff9a625e6901f8281 SHA-256: eac2307b4a7b3effb62eb34fea4835e050f6787b739984c5fa0d64de2bb4da5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to lure victims to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users, likely as part of a phishing campaign or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=force+install+app+android PDF link annotation
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/5118460786.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/6121903194.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/wifubajabisamaziraneke.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16149b9eab76a3---27240867407.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/50561374861.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/64872282737.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459879a9894---54928029691.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/40172387895.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/21f96721949ef0719cc84ff8df31322a/titukijekukadezil.pdfIn PDF document text
    • http://eko-uklid.com/files/file/93229675006.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/45730866448.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/sasobimiw.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/16815632137.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/43007645640.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109050011353406.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/46567122129.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/ranaxiwutubepir.pdfIn PDF document text
    • http://195exim.com/datas/files/vufegebasetevoso.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161304a589879a---34397353194.pdfIn PDF document text
    • https://airbays.com/userfiles/file/nizafile.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/54910368672.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1614740b43eb55---kekedebidesizuxuzikolu.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/lusexedurawawozebenidu.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/10141647720.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a4c5c3d66aa69bfd8aaa872ef0a1e6a4/zafuj.pdfIn 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://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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 10484 bytes
SHA-256: a42211f67ff26d5bd32e8c52eecfa12fa16af42fc88de9233165d7277f4f1e99
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 18188 bytes
SHA-256: e05912216da7da5e79fb1a5431b5e1f9252b3029aebf985b851f1b47f65616c6

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