Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbf92ddfff07f06…

MALICIOUS

PDF

81.0 KB Created: 2021-09-04 01:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e0ba11e60654d9244206f1e577d5d739 SHA-1: 475b5e908275ff27d7c30427adbb9099f072e123 SHA-256: bdbf92ddfff07f06931674c626a113bdaca676f5de63e5f3762e298a2c8920f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on various domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://irlanc.ru/uplcv?utm_term=movements+of+joints+pdf PDF link annotation
    • https://dallaslandscapedesign.com/media/files/gadudifoni.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/pikitadi.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/darepozitodosig.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/xapafevusijuzepimuxiveb.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607eead8331ad---70293545302.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/68657923685.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4tf3fajnglfm3j6gk83ivibbqs/85975549325.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/52140798675.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/pebuwo.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/velaf.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd13a586ae9---biroxepakirulujuzedevaku.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/80372765978.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/86838017415.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/sopanilagedumanokunet.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b05478a1037---dimuviwudijokonas.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075c908698ae---pupexawigakim.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/rixow.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4b1e3a162---norasurerojilotafimi.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/xazukagugigavexisonafewik.pdfIn PDF document text
    • http://aven.su/userfiles/file/53899474333.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/77499539064.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/rolum.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/kujozavegosozarane.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89D 17648 bytes
SHA-256: cc845b56a44d7fdad66cc8dc766c3ed67ce1b000e61aeed2236c802cbdd55db1
font_01_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 10540 bytes
SHA-256: 72954d30cf5426032c465e44096e2fad8516bdb5018d704c0d21cceb14d6c553

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