Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7c8027e8d5b034…

MALICIOUS

PDF

80.8 KB Created: 2021-08-13 23:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3f1c6bc56991159c8f03af64bd19bd84 SHA-1: dd7ba7151fdaa68e7ed2491e65c63b7dea854bcb SHA-256: eb7c8027e8d5b034ca0f7971616a11c7050a0ccf8f627b90dd016013566319bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many pointing to compromised CMS uploads, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=asurion+verizon+insurance+phone+number PDF link annotation
    • http://passaicvalleyclassof1957.com/clients/44362/File/89601892368.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607279a58de7c---71574434452.pdfIn PDF document text
    • https://argumentua.com/i/file/42581884590.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3p06c27urbjcbfckeu50ff0g22/mevusekexobo.pdfIn PDF document text
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/fademixizusikijilela.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/94085384287.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/temukugogukavumifepa.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608633716b5bd---tutebumegezovotepaxosixu.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/xelopijojukaj.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/63094118577.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/mijebanesa.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/lesomitutefadirozexodudad.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/030fe243ca1437ca450f3b6b87fde354/mosanatezuv.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/82083387726.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jadofavubifufesonejipe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610382dc1ede2---16130020279.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/gadurexep.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c9803c53e---dipeponejejudanuju.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/kolamegifademelowobosusa.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/1008814dbc085370df62b4e4702d74c6/voluvitesivevulirobodulak.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/mozisibifuxasi.pdfIn PDF document text
    • http://brlairport.com/images/file/50400277407.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_off0000d7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B5 10844 bytes
SHA-256: 9e31b2a84d4d28585bcb3ad1869069414a1c10cd126cb5f54e961a6dc6894084
font_01_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 17280 bytes
SHA-256: 2cf271ac69601e2bddc30260033b6d8ef47c8046479f1afce6fa252a4acf23c2

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