Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdd559e7cbf6bb8…

MALICIOUS

PDF

86.1 KB Created: 2021-10-04 17:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0024c6ea13e3a459ac6e679851dae6a9 SHA-1: 043334c5554871ec3137512be07bb3b92b709b84 SHA-256: 0fdd559e7cbf6bb839ced0646aa8cc89fa0098e3d5c5d1b6e93ff9a53a11532f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

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://medvor.ru/uplcv?utm_term=somethings+are+worth+fighting+for PDF link annotation
    • https://sicurezzaips.it/uploads/file/95208932454.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/humdu6sa0iclpk1pus1n36kkrr/nukiwawe.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/88226655691.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0b206f6f---7523620477.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/41974440508.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50647385702.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/19e923100fa078a94f871ba439ae2c26/25047985719.pdfIn PDF document text
    • http://greenbelt.abwingsmd.com/uploads/files/91341655186.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/wofumemekoxavukutupexu.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/52392382964.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/37912234219.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/fojenedirefapazizegunen.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1633248965.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/48407643604.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/88333a9bf59e2dcdaa4059e68cea1482/28999606370.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/c1223bef6b576f513ce08c2b4bfe5938/jogajazupezarok.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/xigavukiluketifa.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/manarisewute.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/92220500465.pdfIn PDF document text
    • http://pasaru.com/upload/files/99575727263.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/rudabuka.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/35001957981.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/zizuruvinupefofune.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/pobizidifu.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613712ba32c52---jixixifuki.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_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 21108 bytes
SHA-256: eabdcf0a594fec122f602618c979f23c22e12f4279a4e3814c741b04ef2ac001
font_02_sfnt_off0001320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 10776 bytes
SHA-256: 21e1bdd42a68c7925635bd07440c08d2fc551ff4317e136189d05425f692fa6e

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