Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab24728ef5b2b0f…

MALICIOUS

PDF

100.8 KB Created: 2021-09-03 20:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b5c4bc0bcb33239a58b46dc4097efe61 SHA-1: d283006908afc497c025e33387b41e38f491077b SHA-256: bab24728ef5b2b0f327d2c0218a87e9bf8abce23e20ad97b70a5bf77fd2662de
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, many pointing to potentially compromised or disposable hosting, suggesting a lure for downloading further 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 bypass gateway security. ClamAV detection and ML classification strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75236886200.pdf In PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/dekudojoverawejagukixi.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbb1a0b477---dejuxesopezuxarugowe.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210624142119.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/suliwanuvuvajiraful.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/zemuvesalafifep.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/49519247564.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/4f43da1a87fd32b631def19eb5267531/kezobogupanelilarademuli.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/082a7c569115b0f46a94007e9d9f5a69/68641278869.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/3109651197.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/68495098702.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/59144242829.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/49747998955.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/96365243679.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/videwoluxoxafosepumej.pdfIn PDF document text
    • http://nfc.soo.jp/file/28458592095.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/25854bac144bd0de339dd6b072f17db1/51659290998.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/jozumozerono.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/06820f684b23505ac0b4a40dfea87639/18530649814.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cdd9ff4f9dde36064a711671caf15e08/67261148962.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc040ab8386d8afc3aa04ddac106af45/wibabeximowew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=entendeu+direito+pdfPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 23048 bytes
SHA-256: 370d14e8352a887222fa52ec56aee5ef6aa8ef00b899f88bd7d9af8b59b1d5e8
font_01_sfnt_off000156d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EEE 10196 bytes
SHA-256: b7aac66971f755743c381984d3d9af258fdd8757ba23c0676b283f9ff449103a

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