Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c32796b645e85e3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 00:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 57adb49e01c53fb6d6756ba697be9538 SHA-1: 75117ad8f7be9179e9b376caca93a566ebc17fa9 SHA-256: 9c32796b645e85e3f92563994941eb417355910775f84ef28b267d77986fa9a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many hosted on disposable domains or compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=descargar+un+lector+de+pdf+para+android PDF link annotation
    • http://alpha-th.com/userfiles/file/68303378487.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161276f1bae60e---wowuluxopuzufetaritomuzif.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5266d501c---89736321853.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/bisomimakiwaxilodijimun.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/giwusukowanot.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/3ghmkj2n3re12eh1ct88qojf0r/76344702242.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/gozuvijotat.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/kekijetulujamigob.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/zusupekopikotavuvazetidag.pdfIn PDF document text
    • http://vhz.cz/user-files/savominofulakawu.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/xuruto.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12527d18f7---dajisutabenonurolu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904da72994f---gufokakemejogateleg.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/xukit.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbca6a1626---66263314789.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/zojuforabolafadukuberewam.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/28970504573.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118fb71a36e5---87330447683.pdfIn PDF document text
    • http://tfforming.ru/d/files/lavej.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aefc92416c---welot.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85e9897e5---lodowizoxememevil.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/debulidilewabuzurefakovef.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202109030707145946.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d823d3340---galipobumuv.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_off0000d59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 10896 bytes
SHA-256: 0fd294f8132c7b71b7b08ccf4221da55db67f22279c09f63d8213066dd009faf
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 19436 bytes
SHA-256: 4f0e9718334db7e17a7e895502605f696fc3e43c27b9836667bdf18bee5f48c5

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