Malicious PDF — malware analysis report

Static analysis result for SHA-256 e820a3b872d4a157…

MALICIOUS

PDF

67.8 KB Created: 2021-09-08 04:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 058ff403b148ae83bde4ddbc7e85ea2a SHA-1: e669d25bdc56049252a50ab88ebe570746925a88 SHA-256: e820a3b872d4a157c0ac2d0a880a3179d51031ce739824ff4780868ea5ae83f2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common phishing tactic, to entice users to click on embedded links. These links predominantly point to compromised CMS uploads, specifically WordPress, suggesting a distribution method that leverages vulnerable websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://sgrappresentanze.eu/userfiles/files/defesuzomi.pdf In PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/13944975635.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/gupusesibatajigobefo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/21cr0g29kgt0ajlrnvhtddukpg/55296207593.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff606a27470---pofulobivepibogumize.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d205fcb169---xurizufomafejowaxidazo.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609478b1ad78e---28403950475.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/morupofebamuludig.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074bece759fd---nodorunulawatozijozar.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/domiwet.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/kuvexubajir.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/73938520330.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/wafepewe.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/87191089855.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/deloxaximibavukimeba.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/23323653527.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0a78e029---5455218840.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/wojifeni.pdfIn PDF document text
    • https://termofriz.rs//files/dezorasepebaxezivam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=articulatory+phonetics+bryan+gick+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5D 11328 bytes
SHA-256: 04df723cfba4e7dab41a22fb70f680d31989182814e22096baffb2bd2cbbecc6
font_01_sfnt_off0000c498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC498 14324 bytes
SHA-256: cf457e022861e6bd192a8b63f74f578ab8cc58b708bda7fdf5bbbdd04006a552
font_02_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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