Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d94a177b5ddec6…

MALICIOUS

PDF

63.8 KB Created: 2021-06-23 12:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1ecad6a739e0c00a5f6e957c3e443411 SHA-1: 1e6533ef167c7d3f6b53d67fb4a3e07331aa4189 SHA-256: e9d94a177b5ddec688602562d34badfd67a7d81476e582fa90a541f64c1a5cae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised WordPress sites, designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The presence of numerous links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8602

Heuristics 5

  • 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
  • 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://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/efdb3f746d67cfef3114036e2937ba82/xiwazi.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/vh0albqin7d1nmn00e8t4d3l73/sulasu.pdfIn PDF document text
    • http://prestopc.it/upload/file/34948591165.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/99525ed8c20a6d1fb5463f184b2a67c9/34164106491.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea9b103fad---29264376647.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/0463244ab4983ed6633be9296779cb50/pamonezemapatuwajexa.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/binobizamerutafomix.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0513cb63cc---7183655146.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6c5b5608af4724453522bf2fb8e44b68/91622709067.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e802ac2a0972af53f9b4922dff4d31b5/32155604425.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-20/20210520061434567842.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/vabunogix.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8728c46443a07e171e09560c1f8f707d/doxekaw.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a66fb8709---35765893794.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/161847519799.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/2156c14lid3rtfbgvveliubaq4/63906215679.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077501521cf9---navipilasatelumikuzi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97599ee6e---22882075838.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25ef58b0f8---jodobiwaxokosufawa.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/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=paramasivan+kaluthil+song+mp3+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B2 5752 bytes
SHA-256: 4d85e5fa6f15e24a6001de775b85ea99787b4aa388c9486bef6088e0c8203cf5

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