Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e5ab1e1a2b011c…

MALICIOUS

PDF

88.0 KB Created: 2021-06-25 18:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c71d9e7b8ec4403457540de5306506db SHA-1: 5cd26162019e8929cf6736e6b6b6e31bb552d6a1 SHA-256: 73e5ab1e1a2b011c46982a00aff411d6fa93af8231d121e433f3a93fe080d883
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft/file-upload' directory. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95571e3d72---83749257506.pdf In PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35724bae9---78075132877.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a538dd41841---dedolilaxefamotisuti.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d556b916a4---xutijifamuxekixir.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/60993834027.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e2c6d4586---fudimav.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073c744552bf---32908238832.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/14057748160.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/7af367v9dq0d0lrbja994atems/4182748763.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd9151288c---78572342483.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/mavavikejenipigiponiga.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/39985204808.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-23/20210523220955381920.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a748ff20b3f---tupamakunakimavoperami.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/keneli.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9467eb789e---38285118222.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/63722835793.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099f9e6235c3---duzele.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/fde58322d9ceaa910c68f7ad57c5d6de/7007742612.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f2d2a4e27---16947690445.pdfIn PDF document text
    • https://rosycaffe.com/file/259484658.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/339105362.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/luzibunexib.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/96be64a0f0fe6bac598ba00236475d74/2293100969.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/nafevupuvarapajerakof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=horoscope+sign+by+date+of+birthPDF 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_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 11096 bytes
SHA-256: 886d0a235ef6d585f497b1b1884d5596a1c75ef64d33163f9093d85a74fa1e16
font_01_sfnt_off00011002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12814 16504 bytes
SHA-256: bd429d82135613d5f5821ac5a661dc2c835b8ff3d316557e2c7392f8f93bfa78