Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaa85b65a0a271f…

MALICIOUS

PDF

87.3 KB Created: 2021-07-24 23:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eaa9bb3723264438fece542bac0ea446 SHA-1: 54c8a831fc155e5c01bb4528d67c61201105cc60 SHA-256: eeaa85b65a0a271f2cd6bfe1bce2a816ba0038b13a487bf19172d056bb2f01f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or SEO poisoning campaign. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://sieompaysdebray.fr/lesiom/txt/imgadmin/file/47849209719.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/bd2c1dc8c0c164d688619f5bceaa2008/dadekaxuxogijuxizorekiti.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a4ab497e---87311162970.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4jcdlmaomt00r84m0imm3cjt4r/zepik.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/2b4720cea47b5f70e395e6ca81122ea5/54432594352.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/lapirizazukimedi.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/abbfedb701f46ee1e47b38ef6b9af29f/rifoga.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/nodufelanegepijamowo.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4cf228acc7041701fe0c690cd7d360ab/lufen.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/madelitanarige.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af18ce21c57---29219371697.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/23972935571.pdfIn PDF document text
    • https://ptogel2.com/contents//files/wegegameminofexi.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/70292827632.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/uqv8sogkg05qf8ia74fpndotk1/20771200873.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/bilomugoge.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0c0898ac3b3fa7f8f2d01fac5694376e/17374549273.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/74040129411.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/44811802078.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/713da6177b58a80f6e51c22ab0764330/fomafujufedow.pdfIn PDF document text
    • http://sibservis.com/ckfinder/userfiles/files/nasafuwolazitav.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb9b4885a---fusomabekifu.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/rofaniwenukerosotomewaxi.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/zaweretewapufetazatapuz.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5cc8c6ca---85329265460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+audition+for+jyp+entertainment+onlinePDF 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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 17488 bytes
SHA-256: 04bf90a78be93ed5a1005cbf1830d929df15d665ff7a52afe08e564ca48051a6
font_01_sfnt_off00011d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9B 10912 bytes
SHA-256: 5bf251507c3b807f4a96f0180c4c9012dc8fd1bd88a5927e54b511bbca83dc4e
font_02_sfnt_off000136d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1