Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec5e25b8a269493…

MALICIOUS

PDF

64.4 KB Created: 2021-06-19 00:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8ba667a7ac011967b3bbc5dfc7690f1d SHA-1: 2465541e9fc1a2aa9ded3af1b8126a91d77e01b6 SHA-256: fec5e25b8a269493ce40909255d86170103e36b20bedcd1d9b34499e7b507d48
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://smidgel.ru/uplcv?utm_term=watch+madea+farewell+play+online+free PDF link annotation
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/v178v1ji5f41jenma1d89ml335/napibew.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/57053395798.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/44285213852.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/kuzakudimuge.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9dde869a7---pemodovuwimapamipu.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a268f449b82---70749853579.pdfIn PDF document text
    • http://dnepropress.net/files/file/95771493766.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/28690530442.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/44557420339.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b26905249---begobepivasepuragazexesol.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f15e8ef8f---gotedeviveja.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/wisid.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/q6dqcec51ktfmur8h25a3luc4u/69579378491.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/62139271247.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/3dd27e810879d705cee58ae8d9e3f404/32213860245.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/42279567793.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/wuridelamanaki.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/zuvofavatabelevaxidulisod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9A 5424 bytes
SHA-256: a4d29cafe3abad3926d704d26ffb55027a89ae23268af554f743ad23cb3bd1cd
font_01_sfnt_off0000d1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FF 9708 bytes
SHA-256: 75626873e3dc3b633c14e7ae9f3f68e8819560b65fd2da7de3630783d6cbd0f1

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