Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d48407994d53c3d…

MALICIOUS

PDF

70.6 KB Created: 2021-09-27 11:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 150ecbdd3b4c15a154fcc780aec39f2c SHA-1: 3e599e6b23c757ca30209fc666309b15d45d1d53 SHA-256: 7d48407994d53c3de8b8cc14151eeb68bc410ccf1b540099d40ec8d8483b76d7
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://irlanc.ru/uplcv?utm_term=the+king+of+fighters+2012+android+download PDF link annotation
    • http://jualumnitoronto.com/editor/uploadfiles/9797421683.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/50708232110.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/0cf77d61a1cc03450f490a0efaa12973/52563392124.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/21747609966.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/16c612c3d8cdb4caed9521e35c3f4308/ridinibozipiwiva.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/30964832318.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ea65c05f4d34b3826efef1dc5f08f41b/33695236714.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/52131411732.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/28568293603.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/25429651181.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///sadip.pdfIn PDF document text
    • http://gibisch.biz/files/files/4538628599.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/10755025400.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/bebutinuweti.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/41200492018.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/60179908252.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/javigapifonulofeje.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/difazasomaligeboduzaguwe.pdfIn PDF document text
    • https://smilewax.tw/uploads/files/202109251434154554.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/87545741390.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210922045442150.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/dozamasidodegagazepigi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16151630b7bf00---radaxe.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_off0000b2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DD 15716 bytes
SHA-256: 161c4efbd7985beca3f06485b74649b07f99740c60e68f364b09cb0f40cd7ef6
font_01_sfnt_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 11068 bytes
SHA-256: 74285017f9f25a0fb76ca3662b4fba0d688b69636c8d04458ab8619783108c64