Malicious PDF — malware analysis report

Static analysis result for SHA-256 021019becde11505…

MALICIOUS

PDF

89.8 KB Created: 2021-09-08 05:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e87586e32769e0af481f59f9e4b004be SHA-1: 2e173a0f8139bb76a0d47315c7e78ab9043e23e9 SHA-256: 021019becde1150516edca53da574909f77a7b7547e462b9808d844119cab52b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing lure or malware distribution vector. It functions as a link farm, containing numerous URLs pointing to compromised websites, many of which are hosted on WordPress installations. The presence of multiple external URIs and the 'link farm' heuristic strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://philabc.ru/uplcv?utm_term=hi+finity+reynaers+pdf PDF link annotation
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/53ilsrruigtimbnghij99pqmqm/31025835543.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/erk7lqdkjgc5vv01fplioualsp/74429857017.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/15116981275.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/t2ajhajiqisdvmrce2fdg2lu30/7149388931.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/vozixujijifowipavo.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/uadtenp8sdlr6atttq3efhhld6/77007329904.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609786078cdfa---44275655977.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/zebufokososizi.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/96780882809.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/kuvebakurepujit.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/s7ql91c09rf7kl109tm3adbckh/57991325049.pdfIn PDF document text
    • https://susta.vn/userfiles/file/rupaboji.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/boberejororufolaru.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/rosubigobafon.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/22139795834.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b3100c98f---danakesifojerenene.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/dapanobuzedefituzakukudal.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/26750352809.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7e60aadd0---10815661456.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/visewino.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hml3rtkmo632jt0qhu3luj0cr4/reriwebetedumerulo.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/77048111068.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/fabiganujibuxalus.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160852c33e8b46---14927718164.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/45437851418.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210830_2260D16C9EB94EAC.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_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 10432 bytes
SHA-256: a1118d9aa4299ea63bd1dbff9a83ca98b5cb1ddd84ab6eb25231f10cbd969ab8
font_01_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 18004 bytes
SHA-256: 5052b2d76dda96211488738c27684fb2ce01685e03a2a9a7ab7ff81cf9caafe8
font_02_sfnt_off0001416d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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