Malicious PDF — malware analysis report

Static analysis result for SHA-256 4047e8c191a70f78…

MALICIOUS

PDF

85.2 KB Created: 2021-09-07 00:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1a9b75cd59aff25735711b2e7c6321b4 SHA-1: e2e1c7114f0909c935fa0a5d7ba4063518d9981a SHA-256: 4047e8c191a70f786098a90a7a5df184e5469a4203e9adcb722eff1864c324ee
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and links to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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=discuss+pygmalion+as+a+problem+play+pdf PDF link annotation
    • http://montagnobozzone.it/userfiles/files/mowujekaralumotabaloj.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b62da6041---niwevemo.pdfIn PDF document text
    • https://europartner2.pl/uploads/jajoxuzeduwafelim.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/930f9a86690d937702748a0948ef576b/terozapedavu.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/85353153043.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/76ab6e370d7fefcd5c1308a40e8b17b9/xozafifofimu.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160810f382047a---lekonejidapopivabomavogo.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/fazobubobutaj.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/zukifereninenesega.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/geduruselumotadesawek.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/magumubumibibewuvujibede.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/50231760554.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160932dfc1ff23---zowalodizag.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/dugujexezeselapikorisin.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/rusarugamunaxib.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748b2b1c99c---debup.pdfIn PDF document text
    • https://ivanamihic.com//files/34267936189.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210616105153_249741003.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/abajonabujuzozisam.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/60893331911.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/dafovevimusomowivewepujuw.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210812153445_1507079933.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/20220142705.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d02e8e56e8---71828121665.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/semusolazigitimupuga.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/jujopudosa.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_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 11220 bytes
SHA-256: ea59ed7bf45f227ee91d2463989d223abb6569a2485aa727075488e7655f5366
font_01_sfnt_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 17224 bytes
SHA-256: f0d43e1e9dcb7511796b34e1d7dba98e1797176f235c0895abb51e90ab7f743f
font_02_sfnt_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1