Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4134018fd3cf18…

MALICIOUS

PDF

76.5 KB Created: 2021-09-02 18:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 655e476a09b8b6d9c46773b99d538a89 SHA-1: 005fdc92cfc86b710baac129db1440951d0bbebd SHA-256: 0a4134018fd3cf187ad065a0d1a8ccf8329d08234bdf74dbb826a74719fc62d5
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 a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting domains. The primary purpose appears to be redirecting users to other malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://efeotokiralama.com/Upload/file/wowizarexegepudevafew.pdf In PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210620093430.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/miboxefojakopozexokok.pdfIn PDF document text
    • http://landpas.pl/upload/file/77580752570.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/sesutefupufofixeleza.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/zogesezufikafa.pdfIn PDF document text
    • https://senhewood.com/d/files/duperuxoz.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a04f2ed2---simulirazabujepowababeda.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760445a1c37---xodowiwovoxugemezifezosu.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/18674988055.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/4904091405.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/60592692604.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/judemalodefufegavik.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16247379492264.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/47198986818.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/kagivetejafivavireta.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160722c6cdf530---66217279930.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/d8ac8m0svv03i3iogpgik6dpci/995250042.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/3267300285.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/90370625419.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/taxaxunidasosuvozuwa.pdfIn PDF document text
    • https://pellevah.com/upload/files/buradokipabubijalunud.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/345f11154eef976e626fb72aab0b1f65/19556619417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=family+and+friends+2+evaluation+book+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC711 16832 bytes
SHA-256: e2fa8580ed5862adf47755496ca81241febfb68bbb18be2b4c51445178e0b65c
font_01_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 11268 bytes
SHA-256: 81f2def21b6359b6789d4aa1afc735d6d5389011c3aa6461c15f112a67c028bf
font_02_sfnt_off00010c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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