Malicious PDF — malware analysis report

Static analysis result for SHA-256 e259d42fe58f8e8c…

MALICIOUS

PDF

77.4 KB Created: 2021-07-17 05:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4cc22fcb2a737e7ea3d4410684c697ba SHA-1: 6d57ed99252f74e824762a1f5d4a082dde6593a0 SHA-256: e259d42fe58f8e8cad91c31e8fcb916b8c287bfaa3d3088a16a742c30510e4db
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebe2b82cb6---28980061245.pdf In PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9637bebb---89295611895.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/nukezexovotisemeborebo.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/zigerozaxalevujejijakitag.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/utf22f2lhdkqso4jigthmrghj6/derefezu.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/vosivajavoki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83614d6f2c---67697725645.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/82384597059.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1a0764d1---xoxarupamexolel.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/misavezigeb.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/24422726775.pdfIn PDF document text
    • http://kfbi.ru/content/file/14717775841.pdfIn PDF document text
    • http://rafaelokazakov.com/file/kaxubuzutedivita.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/roreriwanaxudoripumefato.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/89d57049fded4c7031294cd419a3ec6d/35656628038.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/948cs4v64q694n0fa45ktq4j9j/figowinoxividogeruwukeza.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/tusinowokuweroxusexow.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079af07bb820---guwiraruw.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/73419319944.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/83874317806.pdfIn PDF document text
    • http://rc-modeller.se/images/file///sizuvezejapisesewutedibun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=check+length+of+string+javaPDF 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_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 17520 bytes
SHA-256: c294b570f8db662eb4c51cfc399f8fb0ff84dfa4fb6cdcfdd905db08d971b128
font_01_sfnt_off0000f75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 10932 bytes
SHA-256: fe2a581152eda56c6ed7e489a8f7983e03c13349482219de7e20cabac322d4de
font_02_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.