Malicious PDF — malware analysis report

Static analysis result for SHA-256 376fe92b0b7ae440…

MALICIOUS

PDF

95.8 KB Created: 2021-07-26 15:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 314ff6831bc0f82e5e5d4bda4f901b23 SHA-1: 791f3c129951eb29f0dba3d0bbe724a20a94c6b1 SHA-256: 376fe92b0b7ae440983e04a3c0e9a9b6c9401d04f9ca961ecc6e629ff897f72f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cambridgekapurthala.com/damana/userfiles/file/37437706669.pdf In PDF document text
    • https://floridainvestment.cz/files/file/68777500431.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9153cab75---14178690704.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/62379105364.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/58495647265.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/je6fe9put9unm32e0nqb75qo42/86330155972.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/76241932043.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/xavuwetunagemixa.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ouh7uo2fvhatqis0atduqsnm0v/37544802167.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/liel8p4ql8s01vm3krg16dartp/15495527298.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9a84a0bd---pagojeditatab.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/26160473845.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/65203877736.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/delipukolozuw.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4708abe4dc---43293421719.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24151046565.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/wixukilafudafovakanivi.pdfIn PDF document text
    • http://atek-ent.com/upload/file/fugololako.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/terinexawusukomi.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/51612135176.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/49224913584.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a9b68d529---jugapofalokakunewiza.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/18486425958.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/22981169994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=adobe+photoshop+cc+2020+tutorial+pdfPDF 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_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 11076 bytes
SHA-256: 97d49d28fc6188371951b50124711c4717e45d20082ef7c5935fb9eb708b8d77
font_01_sfnt_off00012983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14195 17444 bytes
SHA-256: 8c3de8f9cf35ecbab2b79660a2c1dcbef636d786992190f4c61ca5bcca0b062b