Malicious PDF — malware analysis report

Static analysis result for SHA-256 382e8d94795d892d…

MALICIOUS

PDF

69.6 KB Created: 2021-09-17 13:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96981b1d62c190a36fb79650156062cf SHA-1: 7fc75297d04ea1410308aeefcebf02a607bf8a68 SHA-256: 382e8d94795d892d461b00ad7e2eb3dfebf9d48af820480487bf61fce0488ee2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to websites hosting potentially malicious content or are part of a link farm designed to obscure the true destination. Heuristics indicate these links are used for SEO manipulation and point to compromised CMS uploads, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=bike+games+hack+apk+download PDF link annotation
    • http://techbis.pl/files/file/96348121894.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/metifimepomog.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/82929673083.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/7008358132.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16143d4fc430c6---92303754255.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/duxope.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/73406643548.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/botejidenunakavazufad.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210914121157.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee8b3942ac---36939862570.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/nerozubonetavumedak.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/fomutuvejomipinokujudaxis.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/witavi.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/36074823430.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/86686574906.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/fowapipiritexonerupilo.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/7665973666.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/24055366884.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/jiwajozexusorum.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133edba0cdad---5122432139.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/74753884627.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/41820655178.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/33688141710.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/kifotofipenapal.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_off0000b3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B6 14420 bytes
SHA-256: 42160b1f37aea4e2e06958d514b7b8f0b6b7d0070e22e375453b2ec34220ba74
font_01_sfnt_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 10996 bytes
SHA-256: d8c6a2e3c33655dac34387d341222eae8b4c8f35fb59cf83673671436c8317f2
font_02_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1