Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7275f68dde7906…

MALICIOUS

PDF

96.8 KB Created: 2021-07-23 04:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e07371cfba07cc7ea8e90f9feee64f62 SHA-1: 2a6a34b4d54e387a17636ec9baa1011fe6638b8b SHA-256: 2c7275f68dde7906b3ab61886c33ab54b9c75183d08bdebf33362376b8bfb97e
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to other PDF files hosted on compromised WordPress sites. The presence of an IP address literal in a URI further suggests an attempt to bypass domain-based defenses.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb668b0bb---15153138553.pdf In PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160759c97ef899---tomotagofijaluzupezumaper.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd6407d8c8---76009350533.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/is7amk9h24b55g5th0vi3hhfl5/wopekimazaduziveleko.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/kevewopurigipotafowonaput.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4nsjd5u999c653a6iudo4frrm2/60223645111.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/79368280800.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/39346827167.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/6537487508.pdfIn PDF document text
    • https://ibextrail.com/editor-images/99868396280.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/5bfae0c332c98b5b1ebb68075403dd5f/guvupodakoverixupi.pdfIn PDF document text
    • http://140.121.176.106/ckfinder/userfiles/files/rogubezerukebokerubanevup.pdfPDF link annotation
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841bdd91a82---93695650051.pdfIn PDF document text
    • https://ekransamara.ru/files/63382955707.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/9e289832552d5fa08e5ac5a1bb720bc8/945651141.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f28e8982---fapubegexifejuna.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/03641c300fce9a4a6912c6e5d4a75169/bomubu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7056232a90fd45158279da1505043239/voguguvit.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/714b6a418004fc7c0f19e0e7eef7d0fe/lumiwu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/31157523777.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd712502c---85942051095.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/2lqmt8u6gup39746liqt82vg14/11557551497.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d36774b5dad---16113185645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=toy+poodle+and+shih+tzu+mix+for+salePDF 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_off000116eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EB 11100 bytes
SHA-256: d4a854aecf6de4e5041f963b75cb21c6fa3ec62c8b2a975d517be6d7f5e58a41
font_01_sfnt_off000130a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A4 17036 bytes
SHA-256: d908cd3478fb2d5b5b24dda935d736d41b78cb1eb932553844ad590a4141d775
font_02_sfnt_off00015cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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