Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bba12d46cf392a8…

MALICIOUS

PDF

89.1 KB Created: 2021-06-28 23:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a1e458c126292d1ea14e0e870d463e34 SHA-1: 2c8d8e598fe08a061ff63cf7a8bde4e4d3832bab SHA-256: 1bba12d46cf392a855d83c85e3e1a691ecd90978ad6a9868064306d212927fd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves exploiting user trust through a deceptive document, likely leading to credential harvesting or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://laborke.ru/uplcv?utm_term=ella+fitzgerald+the+girl+from+ipanema PDF link annotation
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/22573a53a7ba767cda2abeb55c98ffa5/28806882005.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3kejndqgde913mql9cdpo2t261/59078023304.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/26c51595f8d604003c849fbe330cdfbd/99487965968.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/52e305ac3ee229b83bd6abcae6390ffd/jelapamibezokol.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc4db0f204---xuwifidexe.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/bizobalalegitiji.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/af42538414980c23769dceb3d8f8cda9/vigipufudumel.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/92820257249.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/jukedudofobuniwuduvibuwuz.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc114b817b---72225577195.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094113110a87---tibenegifu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096d101ac6b4---46854267966.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/24777377679.pdfIn PDF document text
    • http://93564497.com/userfiles/xavubupumigazo.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/vewuwimifilutevejadavetar.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/25314207087.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0bceda64c68ebc7947d5511e77feca99/35543825249.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3342e4c730---maxonuwazalonaxaxurojej.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/49806814391.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/92335224246.pdfIn PDF document text
    • http://bjjiffy.com/upload/88925659842.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/032fd7cf2228c70ee0c0bd475b40f9a6/milogasalopotesefilabez.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/3u31ln0kif0jenv0hf4sjcvj9u/lajilusipowinivoxu.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_off0000f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 10820 bytes
SHA-256: 3e97cf2cf3e64906f46014b329c62dc3edcb3169cd1de20df5753e10db9a7921
font_01_sfnt_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12497 20436 bytes
SHA-256: a3f392ac8ab7d509e89287ba73478d94ec060e6529d20f04b639a77d623158fd

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