Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e2c0faaa89a223…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 21:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c722891991ebe80e2802ea98e734920c SHA-1: 6b1c6037eb566555dc4b7f6db62f7c41a754a9ad SHA-256: c5e2c0faaa89a2237a1d9d603e68a4035d8a4ab6766b367af50111de630e9c1e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://webmenuplus.com/images/file/xukenatojidagag.pdf In PDF document text
    • https://solidpractise.com/files/userfiles/file/63901133765.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609100a3f0582---pugasinopol.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/45814198894.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/jbdrddlnfllgkmdogca746c0ig/10819451395.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f7de33eb3d71e357d9e02015480acaec/85436461803.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/tebudedizeninafudifiwonuf.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/38293389448.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/58143687470.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d66664d4d6---21025556934.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9fe3a904a---malobiserar.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/baridifamekafawugifefiga.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/qr8vl5d719ab876qvkfnksi9a4/lanalu.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/tva9m19dot2k9ev1ne0gtm4kre/46037155407.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/eqmmg1ua7qv9e5jqp2j2p7s3bi/86360178483.pdfIn PDF document text
    • https://digireg.li/upload/wirivewiseg.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bf94acabc---zuweranot.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/31f9d822d28975bdd725784d87d5cc50/jilegenosunikokudawag.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/77014196384.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/fadukozuzag.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/c3e1qjevtgfh47nk0qtqgeem00/woluluvibewaxesibidopoxef.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/18272149336.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name//files/8405950068.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/k8ougoksnml9aibia95h82lvu0/xefosiki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=breastfeeding+support+near+mePDF 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_off0000ee85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 10948 bytes
SHA-256: 8b79c496f4368b7beafe96c5004eb8a69736594eaa1e029113889a862801a556
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 18224 bytes
SHA-256: 3f816618b3973d88d3a7b3d254dbb38718d8ab07c8bfe488558f5fea7abede32

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