Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef814d2b7db18d9…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 12:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4a57b4d84dabb0acc2cf27b2ccc5ec83 SHA-1: d1cbf9d6af8a1729cbe008c82d420443391c62fd SHA-256: 1ef814d2b7db18d95c2e5e23f1aa6d2de6a1977072f62c176d3052911553b967
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to deceive users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://medvor.ru/uplcv?utm_term=how+to+reduce+a+pdf+file+on+a+mac PDF link annotation
    • https://vishalahospitality.com/ckfinder/userfiles/files/lagisafenutiwofuvosoxazeg.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/isqm78d50d777f5t81piu3irpe/fiwalisaxofumepozaro.pdfIn PDF document text
    • http://hiniceshine.com/upload/80910539805.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/jeralopijiwepupomo.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/zikamorepusuginetusowulo.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/moberaxejetofadonirof.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///5509441243.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9df24e450aa83bca27d1396f74cf478d/74023727243.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/niwona.pdfIn PDF document text
    • http://npas.ru/pic/file/79389116159.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8eedec57e670622053e5902d3b546eb7/61517137780.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/3e8eetg4q33tbieol756e18l3k/jopusadukukunit.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161121604c18e8---jemolesewetididajokumuli.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/34640110994.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944e49ebf4b---takup.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b83fc6deecbadcc1d14a8a618c81792a/kewudekidepokipojoveb.pdfIn PDF document text
    • https://people11people.gr/uploads/File/zanonoralipegamibizabexak.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/fb4aic8aus7489h9rt9bcr6o32/nulovebimolozurut.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/giriwagidupexoko.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/gesiwadawalum.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/2986655448.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/84f57e01f10623b1ef54a1e74e7c3c3b/34483284774.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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 18408 bytes
SHA-256: 537b794f83ac96b9b5aa94e5b171e188a5a30f5f26774c15bf6490926f2e67eb
font_01_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 10792 bytes
SHA-256: c1375464d92c63ec1c07bc716c0903e6411a97fab063ef2024bcdeb9cff4690e
font_02_sfnt_off000125b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.