Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee1b5333794b5a0…

MALICIOUS

PDF

95.8 KB Created: 2021-09-04 18:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4176a3f3c22d7416c6ff0eee63423242 SHA-1: e2a02cc30b14ef48124d60b27c03b9dc7628d580 SHA-256: eee1b5333794b5a07588bb7a298068287a6b0fbfd7b24eae77d4d615050d605c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress sites. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ketchas.ru/uplcv?utm_term=insert+photo+into+pdf+in+preview PDF link annotation
    • http://studiotecnicolamanna.com/userfiles/files/9859400466.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/30baa18f2d95b9904ee2651c33521d84/dokobumikenapuguxarego.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/gejozinokexet.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/74100008719.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/73140743025.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4a8681eeb---toburebabigajuxi.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/357ef67189778d60cf13d540553113bb/demitasavajasepamokod.pdfIn PDF document text
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/somaja.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/66336255120.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/bexogumemikewesivedamug.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/70423683687.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b4898d17d62---fotanodogudofitite.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/db3824613278dbb3d842ed1913083a6b/bixuloladozurerazukosep.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/vfg6evulctr9dp1dnsrs9vdie1/gagesusegajatikatefigezur.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/kgo63k1vdrp616ajhaq08dh6m4/lezimabixoxanog.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59b30160558bec40482390fa110981b0/8785582498.pdfIn PDF document text
    • http://apple888.vn/luutru/files/xobizadarodix.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b536eabec2e---20952259836.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/85bc3619112ae2e98842ec3ad3f2f7de/dodin.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/26226149266.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/tuvanajakanisisen.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/sesamujiriludaponibepeme.pdfIn PDF document text
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/15246766888.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_off00011513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 10492 bytes
SHA-256: 4cf732582630be490f871c6e72cd8d5c04c106e51ce8277ac5674aeb14237755
font_01_sfnt_off00012ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE0 17168 bytes
SHA-256: 87d99af5f74aaefbea79fbbaf508619723484462c1531ac821217eefa394a5e6
font_02_sfnt_off00015995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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