Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8e05b6ff140fe3…

MALICIOUS

PDF

73.9 KB Created: 2021-09-27 05:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8afc941dccda96796e330fa408b148f SHA-1: 1ee0b404e3389491d9961619b3d7f4e8ee00a5a9 SHA-256: ed8e05b6ff140fe334e9740feb1185d63b0492f26d5a295b454c1293e6e7e932
176 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, likely intended to redirect users to malicious content. The ML classifier also strongly indicated maliciousness, supporting the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://laborke.ru/uplcv?utm_term=android+scan+photo PDF link annotation
    • http://nfc-lampang.com/user_img/files/jogedi.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9402e778712684ad4dd878ffbf35a277/xudifenilowobu.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/wifadexosajosemuw.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/savatelaxomuxexum.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/ralabilelanenik.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/sifujerodemifikunozuzes.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16141e2a464f90---23344718933.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8a6af387e31e7153962c47eac8e99d02/jaleve.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///zifimijekumuditexupufak.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ap16oqordgmjv6snpvabe8lh14/zawemipewolola.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/2012ee53644f068ba2061004d91cd5f6/vumudur.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/7737281404.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/liwegepuzat.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/tidav.pdfIn PDF document text
    • https://tch.lu/files/files/56613235247.pdfIn PDF document text
    • http://weldingplaza.com/files/file/92448854567.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/kexizuxubiwi.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16137d8fbc01ee---jevavejonazujimukuz.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/kifufafololoz.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/sofuxuwukanopuj.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_off0000baa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA8 10416 bytes
SHA-256: 14d7fa580cfa34e293f7fd2e5f3344accf8882d489f58f618c29d64d15783aad
font_01_sfnt_off0000d234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 18580 bytes
SHA-256: 3a869db3350d9f9e0b04ec0991bc4fab5fe0be4f11875f0264d02b7ecd31ece7