Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0ef45a3cda4450…

MALICIOUS

PDF

80.6 KB Created: 2021-09-23 06:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b25d77b932367d47d5457d306161dd6 SHA-1: fa14d296c36c3a26c2804ee2031a38cc7ff14463 SHA-256: 9b0ef45a3cda445043a19a370632ef0e900db6ebec1c79bfb84163322cdeb11f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'cmd.com/data/files/' in the document text, alongside the ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://oniceh.ru/uplcv?utm_term=touchwiz+app+keeps+stopping PDF link annotation
    • https://berettyotv.hu/userfiles/files/61964972218.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/69094806476.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/pepawepu.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/rojezedebem.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/49ccdfc125c864dbc68c73669be2e892/17390283211.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/tinebikovuvaka.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/28591738326.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/gopowufu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5380491c8---48580113285.pdfIn PDF document text
    • http://oookub.ru/upload/fckeditor/file/52929761416.pdfIn PDF document text
    • http://qdcmd.com/data/files/fibufijudixubasuk.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/ruzupagelilufe.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/1423274430.pdfIn macro / runtime command snippet
    • http://irvinenott.co.uk/ckfinder/userfiles/files/96524098062.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/tufoxodukum.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109020835354434.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/86233477396.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/55041592840.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/84452913010.pdfIn PDF document text
    • https://kapefashion.com/files/files/ginivonutidawivesibezuset.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/jesan.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/75381348292.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/7113684849.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/mawaxofovononematuvo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qf94ui24tedvegnbeiu1spko94/62242054263.pdfIn PDF document text
    • http://lynhuagiasiIn macro / runtime command snippet
    • 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_off0000d6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 17524 bytes
SHA-256: d3e1cea1baaeced508040143783153ed27e571b7ddde5208d73cf708d9599a33
font_02_sfnt_off00011c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C01 10808 bytes
SHA-256: 4c5bd1ef3623c07bcc5792f30572822cb6b2e2802944b8d5872c7a28dbc8d10b

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