Malicious PDF — malware analysis report

Static analysis result for SHA-256 80feb088df97cba2…

MALICIOUS

PDF

88.7 KB Created: 2021-08-10 09:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 42b58d32142df3d12a63f6342d20d74a SHA-1: e94b1bb1ac9b27dedfb07bcbe6a16bd194458f0c SHA-256: 80feb088df97cba206ba03f453d7d0c2f1399bbf71a6c1246a3a98ed992069a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and numerous external links strongly suggest an intent to deliver a malicious payload or phish credentials.

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://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ffbe025f345---55436170246.pdf In PDF document text
    • http://cropscipublisher.com/files/upfiles/file/90483144295.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/72742058000.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108dead4c91d---98726418029.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/61649f464c2b716fa71cd16558319214/raxobewidowadevabolejuz.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c437a52b4c3---fepogosiziza.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dff567c50b9---53174737388.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/39381981213.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/bebitorutudu.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16070daacaedf4---54096927886.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/kukemipufomovunir.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/76454702555.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///ruvozovoziruwufazegujig.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b9b047cd9---tatiwaxiribi.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-7-30/20210730115917201908.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb8f822db---5794076303.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/wikuwodarevofiwow.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/wemidosi.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/kiligoxefupizikarijunimig.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/61656f2863b9bf87ce449f9e379ac7e8/xixofapi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/35fa3d1254be764f90330e070290eb5f/640865378.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9551b0fad13535cc61602630a337c7e0/pawivemaziguvutewamatosos.pdfIn PDF document text
    • http://hnysft.com/d/files/27292299997.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/wulokizutopizipele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=lyft+roadshow+presentation+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75ef17839---61172646281.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_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 20140 bytes
SHA-256: 274bcc9dcd9598c637315404628f52fc674912c44271b9a3f7e7887c8af7e9d6
font_01_sfnt_off00012479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12479 10704 bytes
SHA-256: d8cbfc8c062977359dc4009582a943946fa27f922c46bc9f0eb0feb2703e8107
font_02_sfnt_off00013d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1