Malicious PDF — malware analysis report

Static analysis result for SHA-256 4407fe03586fdde8…

MALICIOUS

PDF

102.5 KB Created: 2021-06-10 13:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 22205f8d5e1510ad531081741d345c3f SHA-1: 5e79ce877236781a069cbc7fb22ccb57ae03baa9 SHA-256: 4407fe03586fdde8644320ef7ab635e45105e61e48c40c5f17f7de4f000c1a58
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, designed to act as a link farm. The document body, though heavily obfuscated, contains references to 'action movies' and 'full movies english', suggesting a lure to phishing or malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://synerhu.ru/uplcv?utm_term=action+movies+full+movies+english PDF link annotation
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608129bd37110---lejedumavara.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a16d50013a---zugarezejubodakexulis.pdfIn PDF document text
    • http://landpas.pl/upload/file/lexavanuwuzikemasewo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f850432ed5---bipof.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3a401d98e9c7e32a1fdf9e3777db4f2/xugibujekatuja.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea028de2f7---2186799993.pdfIn PDF document text
    • https://hgb.se/filer/file/35649332468.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/50867821584.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/kuvotekotexi.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099eb75dcd7e---54928618961.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/jkjfvmc6r5cgpm35p226v56r25/39169607976.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086881dd1cb4---gosanijuzuvaka.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/98432304396.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/tghpb3pmdcfq1u53pq1pdm63jv/39982610737.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160705b65dabed---fivuzosopinuzebum.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1svanubvt1bv5lh97r2g7lo4e6/33163263311.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_off00015469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15469 5040 bytes
SHA-256: 67641f5d9d69d7d6e36632b4421c7cc6481baf1e3bc3543cf776e445e347d04d
font_01_sfnt_off0001657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1657D 11180 bytes
SHA-256: c71308ef4e2f0c7d4d0c90b43282fa4a2596a24dd3322e1fb12c3f3239246d12