Malicious PDF — malware analysis report

Static analysis result for SHA-256 80491aa613b65ca1…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 03:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8cfa062ab96993b4390e193e43cb9187 SHA-1: 6f7f402e1746cc3a61680856cd1dfd284e234268 SHA-256: 80491aa613b65ca1b54a2b0df741b9fa0fcefd6224d063656032a4c8a65ecddb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and link farm heuristics, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to compromised websites for further exploitation. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=1111+meaning+bible PDF link annotation
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/7961492022.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/th9liv4aoamd9k7eljupeiphh0/noxiveme.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc98c4814---katijinowafubidolediv.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/belanog.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb548bd58---ruvipevid.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/49481316714.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7461ac85adbd25ef9b77ab445fa6d948/13117997664.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1dda839a3---83675031160.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/kazuzukupi.pdfIn PDF document text
    • http://garderoba.sk/images/_file/pikotemirozagiborufizape.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b29e20ed93---tanifizisavexujuvivuf.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0914b1178b---8688372658.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c013732de7f---fazadabemitiwewiworiwov.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/64258833673.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/dujibidalitizusofo.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210626032921.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609492d8ab36a---neduda.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c83a2215a78196fcd976992f24293254/21865884967.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a792aad3---pagufosukalawekutux.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/gerim.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/jedowarigixefifugoxuvi.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/58171051365.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afd7e2da50f---xadadusat.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607204489a695---sezoluzolezizokimevuvu.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_off0000ea39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 16908 bytes
SHA-256: 5273ed551a61a7c6759e449acaf8a16dbee301a0f57c17c2a7497ad1a7bedef7
font_01_sfnt_off00011592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11592 10060 bytes
SHA-256: 94b04d9e3e028457ca0b06329f3bd473430558779a10708de2db41b3a9b0026d
font_02_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1