Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abad05d83f74502…

MALICIOUS

PDF

80.9 KB Created: 2021-09-04 07:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f50f8af49858e823d511963c8979247 SHA-1: 22760cf5f6369da7ffbec06bd6d5743f7b88be67 SHA-256: 2abad05d83f74502dac9ece347cc5076d6705e06075a8220163193b4ae702cb7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=regular+and+irregular+shapes+worksheet+year+4 PDF link annotation
    • https://bilegt.mn/userfiles/files/xigimew.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/onm46md1haecrp4j6166m7ke24/lurolozitejamujep.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6b146b15446dfa9d270a744c83bd5ee1/22848090240.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/88437406590.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/sivaxewe.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/1442455818.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b776c9ae4cc---72985264955.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20217725355195.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/97407268823.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/f6c3e107aaf9a1d5eed0090cafaf62ec/7949428670.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/38067615041.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/newademu.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/eoglevcusgg3kesho13fg9k425/lanuwuwuwatupavan.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/mixupu.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/85876255841.pdfIn PDF document text
    • https://aromamarketing.md/img/files/65715736723.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/78427003879.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7ae464c7d4292b15103f3ce4dd322b9c/94783530358.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/68156187774.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707475e14ec---diragat.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/devavuno.pdfIn PDF document text
    • http://mamam.by/upload/File/file/56158486390.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160989423b6aa2---26895459709.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609657f5af8be---44353487114.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/bafilibuv.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 17784 bytes
SHA-256: a0e643b81e6877abd1b3a2bfb6153085c7b4ecd190bc5d734a1faf6b6cf36ea7
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC1 11184 bytes
SHA-256: e17339d276cb63d6bf19d84c79a2753cfbddea9df9cde44407fe5408dee60fd0

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