Malicious PDF — malware analysis report

Static analysis result for SHA-256 752e671aa5e4ab0e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 08:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eae06bd928171b6ac622760e5db02c58 SHA-1: 396e8dfb313062536bf6ea088af6dbdf80556e67 SHA-256: 752e671aa5e4ab0ed574a1fd184e79b44b27861d81fa48bb37febb6a003deef1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution attempt. The presence of these links indicates an attempt to redirect the user to malicious content, likely exploiting a vulnerability within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=pi+music+player+pro+apk PDF link annotation
    • https://tselectromechanical.com/uploads/CKfiles/files/senitosejisepajikojorul.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436436cc069---mebuvekavowisupiz.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/29028795869.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613af942d4ee5---sikavafeso.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/92434676156.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210912123145390830xazk2f.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613227a4b7aa1---lewokimuwetijakedotu.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/35000142946.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc7d6db69d---sejoniwazaperena.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/bezivuwim.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021090634427_678993261.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b89c938459199b42362cba6621571b85/35901416397.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/19255716420.pdfIn PDF document text
    • http://cabini.it/userfiles/files/61309140163.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021090215002463.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/32907850448.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/mubiseneni.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/tizeparuv.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/64571252650.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/43761116293.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/df1jofu4jifps7cj0fcpqv9cc8/wojati.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/porezutumenasikigu.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/86429795203.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/84494607363.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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 10640 bytes
SHA-256: 034e712632136301607fbb5899f9608ec82af100d8c61657dc164a563507fe0d
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 18872 bytes
SHA-256: 34d733b1a8ec534add7ce42c2776bac47f02236d37164dfe607aef13278ebb2c

Open this report in the interactive analyzer, or submit your own file for analysis.