Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3046446dc688eb…

MALICIOUS

PDF

77.4 KB Created: 2021-09-18 18:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc8f7503d02db1adb35ee41c87d1fcb1 SHA-1: 5922c123abe6105587159afe61ba82147f036ba0 SHA-256: 6e3046446dc688eb112ee2aa2dc90e22fa7bf0ce0643e65f226e010ceaa2ddd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://scpt.it/userfiles/files/jetutekutuvota.pdf In PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rarotupozejiwi.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/nanonadak.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/0sams0jbmufru6re25p8f33fql/33610123774.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/6108864204.pdfIn PDF document text
    • https://viceda.com/userfiles/file/35796645445.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/74950978323.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/91598495488.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/68511173135.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/19868841788.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/xariminidamobumipakedita.pdfIn PDF document text
    • http://dogable.de/userfiles/file/sijipa.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1f4d3ce6---vipakajatavu.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/48549940345.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/93462014485.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/jovewuxegatabevade.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/walosevepaxugoni.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/mibekisisitufevevuretozak.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/oace6lle7688vpo2dls8k1cq8e/nifatugajubunarod.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/93513854852.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/pafuvipiwuroxisujop.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/40d8dcbacfd0d59c00ba4f7b461dad81/likeseniranudulimosipe.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/vetenapenagabomuji.pdfIn PDF document text
    • http://mcutech.net/files/zufige.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/9612742375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=picsart+gold+freePDF link annotation
    • 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_off0000ca9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 10548 bytes
SHA-256: e39ce6581332d5ccdc99f8baf39fc3ac9795e8d4ac05cd92644bcf0c33ef416b
font_02_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 17712 bytes
SHA-256: 067faf396dc60a4ce132316dad063deada1e6b07df2e4aa0a8bb6761a576a063