Malicious PDF — malware analysis report

Static analysis result for SHA-256 7068e92dc4c8fae3…

MALICIOUS

PDF

87.8 KB Created: 2021-09-16 17:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bae4af5ae434603d03f974bc19836401 SHA-1: e46a287b752935440843a3d75418ecd95c38c79d SHA-256: 7068e92dc4c8fae3c1c9611ca8200463c052daf8c96c8570bf0bd7ab76949c80
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites, suggesting an attempt to deliver a payload or phish users. The presence of a visual download button further supports a malicious intent to trick the user into downloading content. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=mulan+free+download PDF link annotation
    • https://manhalhealing.com/userfiles/file/11546413606.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/zegopelikavafipokila.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/wizopezikeromub.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/97280106219.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/70088928672.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/56615985873.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/gafav.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/fevawojujigek.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebc8c7c24d---27970424552.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/76116441021.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/22960550730.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/lanovowilatexanupov.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/bazino.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/zubifexixufikewiva.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/sijokitisetatasozusoterap.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/dukitixetusawanar.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/fodogudunubegiwi.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/58324808361.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/fb42b93c8a959d39fce07090fae51a1d/20873757566.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/65461532549.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/96897317317.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6730e8f5f896fa23d82431e7b0bcfbe7/31676804347.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da9569dcc1---febawewiwazaxinizevi.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/rujinatemolidedomif.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/91482828196.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 20752 bytes
SHA-256: 8cf177bf5d3af207b4ab9bd23f99a9c011ea80af216df5969bbdfccca133afac
font_01_sfnt_off000122e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E3 10168 bytes
SHA-256: d9d9212f4ad662f395965bf6bb84ac6e3654852167aea79e0ded729bae6d89de
font_02_sfnt_off000139ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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