Malicious PDF — malware analysis report

Static analysis result for SHA-256 58edb2a303c21140…

MALICIOUS

PDF

96.2 KB Created: 2021-06-23 19:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e1b044698621f2ca26eb55cf7b84ded2 SHA-1: 00a255dd10a533ee6f275cc8446ca58e689a9234 SHA-256: 58edb2a303c211402b9a2237f41818248674db8892bea090d9d6d9715025397d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely attempt to lure users to malicious content, possibly via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c571fef0fe8---nagoximumogitigimu.pdf In PDF document text
    • http://xn--80aawifdlfr.xn--p1ai/ckfinder/userfiles/files/pabafugugoderuxuki.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/3urjoivuptqjcmrbb38ih3fpce/jaroniwevaludamarudonufen.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/08faa2f6d533547a660f9ff593b47221/vusalipunolapidubigapod.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0be910664567dc2e8a01a3f74d45842b/2669357226.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a5153bf1---20091476658.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/b1bgvssvoh52vr4matr2scem06/guputodizoka.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd0d0c5ab---xitinalilisuzura.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/lejapakupixis.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/13188447372.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/81737952283.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57d0dc5cd---rodoja.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/sarubefo.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/77a27f7dd423db3315aa8ccc7c576877/74735730553.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/90a80016950c718fca5fcae869ab81d5/senokijanubelupuv.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607783092957c---dezamafezaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cs+go+hacks+commandsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 5192 bytes
SHA-256: 1af0467edb1a84ce2f16750e5685f8f96a67a541eb9fd017fb500e473b29f1c6
font_01_sfnt_off0001459d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459D 15340 bytes
SHA-256: 675bbda6107a0ce72fca6fe21ee30e77e74b192901be07c9f8746d84a7c0cda3