Malicious PDF — malware analysis report

Static analysis result for SHA-256 618eb09143c59833…

MALICIOUS

PDF

90.2 KB Created: 2021-07-20 18:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 02821d51a14b78b64013c4fcf28f5a31 SHA-1: c1592a393c4c31bd4b9aa8ee3fb5930b38cdef64 SHA-256: 618eb09143c59833e40b98745cc6042ee00145ba3c9ae0b11cb5be95ca3bad57
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some pointing to IP addresses and compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/f0a9a6e22bcb07f95b273439941e49b3/95167007467.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c89a2d2c32---wavapomotutusakunep.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/datexamuru.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/xupiso.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b42c571c---28037324234.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/7eb2735ec1f98184003c580814cb0357/5953001527.pdfIn PDF document text
    • https://yellowstonewildlife.com/mazidudanetek.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ed374drq5mufra4q7ao8s27o06/wigetalogupemozasidukixij.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/e29560ffa7b24627529184c00a2ebb9c/27245767550.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3d1mmbjaem0bf9vnq436pfdsm1/xitagewujesewasen.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/39759836198.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c233ee2e441---42961837883.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/3a894fefc988eb65f2dc006a00dc2ac4/debisisuzewatigu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5bcf6869a---51175347270.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/pozeliralavatiket.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4107f7c468---lepalomonefakaxunag.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/rerek.pdfIn PDF document text
    • https://noddy.nu/images/file/12580481929.pdfIn PDF document text
    • http://52.74.160.208/ckfinder/userfiles/files/xopitusibito.pdfPDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc4e03c0d---63303373076.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/wenokijaronixosapepitamos.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1457_20210518135052.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/82259607995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=one+two+three+spellingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 17492 bytes
SHA-256: d5204c859c84d0877fb2fb9449cb7b85eb3a6b62845a53eec83fb639c506365e
font_01_sfnt_off00012a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2D 10480 bytes
SHA-256: 712188f94aca299c03085d246e5a75c2d16c466743dd8550512a0a3183ed1a59
font_02_sfnt_off00014200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14200 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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