Malicious PDF — malware analysis report

Static analysis result for SHA-256 754de0bae2da9864…

MALICIOUS

PDF

99.9 KB Created: 2021-08-07 20:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3f54344bd883b0ed6294d7d5f0efda97 SHA-1: 6f77cc02b9710032ca686db16a20807f54e4a354 SHA-256: 754de0bae2da98641e8edb672883f6c2523f91a1c67de71016ed65c7b5249f04
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many hosted on compromised CMS upload directories. These links are presented in a way that suggests movie downloads, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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 https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/gptjube6bk8ikdltmn7r9fl4o5/fobizekadom.pdf In PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/8kt55p97a4tan8p1mjg9n6opp0/96724950654.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ec770440ad618f92fbc6a430dca69fa3/54139559640.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/logijewovef.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/88664276790.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/nowowidowesudejabufotit.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/82531672450.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/73159805956.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/86581352494.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b59b63dee---wibukifela.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c5f6813cada1667d814152fb126379d0/82894850773.pdfIn PDF document text
    • http://dejede.com/userfiles/file/26458842524.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/30064134459.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2fa989c40021be175df4ddaf1aecba81/27820206247.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/31950448611.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/2a67decaf31c7af423443f06cf019eb6/pozitasunularijojidagax.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/9d0fe2edf50864a490d7a0803ee1296b/25674312030.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/tofopozotemexosoleved.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/viridig.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/9757114885.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/461cf1175ac8fe5fb5ece4f13ace5c0a/dotekeloboxomimurupozumab.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/tefuxiseradisuxebobebik.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/404ac5b2c2294d67f0c0fdff07bd76df/71916558442.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/50177035601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=maleficent+2014+full+movie+in+hindi+dubbed+download+480p+9xmoviesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 12020 bytes
SHA-256: 84a069b0669ffaac7b0ba0d2ebaa8be553a26254316830e1f627a9e773d11e5e
font_02_sfnt_off000136e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E0 16120 bytes
SHA-256: 19fb3e0837d6f9ee728c5331d7bb33e1bff3d595bd4ca4a0aae7833d7d421d60
font_03_sfnt_off00014c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C36 20076 bytes
SHA-256: 370b85ca653188b05e64a4f87c58cdcd70751443d86870ec15cc061c522a4b29

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