Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec2018557f60a3a…

MALICIOUS

PDF

83.3 KB Created: 2021-08-09 03:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 61bdde687ff0ba4ba0956a74da95dcf2 SHA-1: 53bf9c9aed3469ca3dba33a4a8988fb370d5393b SHA-256: 8ec2018557f60a3a360ea351d02048094223d671b423eef01672d83d41683661
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs point towards a malicious document distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=kenya+road+signs+pdf+download PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/49481074398.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ed68639e0---sosorejitexe.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076771101365---65383770001.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/walitosotobolosobemik.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa242b75963---48204638145.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/13745946235.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097ab15b81ce---48255686253.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7dfc127ba8d181d11078b8b2189df505/suzojomig.pdfIn PDF document text
    • http://www.77ice.com/upload/files/mokekunavijajewatasad.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fofulejazepi.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/351h1q6l0kfo1l37uaj1dsdpgd/xiraxujujijekovoz.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/wuketikebawamuxowodaba.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25f19e086---pekotanutewexofonuvibopup.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/buminesimowinanoxot.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/nifikudagofujosiwedo.pdfIn PDF document text
    • http://baove24h.org/upload/files/74129433673.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/kobopaduped.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/kamuxes.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f659314d0de---piwuvokukobinip.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/bf50590fc7ce4085cefabae0fa299077/9811131619.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083300604ce2---fetamu.pdfIn PDF document text
    • http://getem.eu/files/file/64533872582.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_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 16720 bytes
SHA-256: f92d9ba885711e6176a5bbd09f54c18a8d3b55807e8749e925f2fb965b4e3e56
font_01_sfnt_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 10764 bytes
SHA-256: 976a161b5cc033cd05e8a08b2eb72ceff846f66b071d3fa81ec04b6149728806
font_02_sfnt_off00012852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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