Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5faf3c1c7670e3…

MALICIOUS

PDF

82.5 KB Created: 2021-09-13 14:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f7b94aa1c6081abfb14df1ba26c7dc3 SHA-1: 662a045e599d4507d240af849024c658a90fc0f7 SHA-256: ba5faf3c1c7670e34b93af42b7fe57542e354a04d989f37e37ca0413988f5c7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure. ClamAV detection and ML classification confirm the malicious nature of the file, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=havoc+os+moto+g5+plus PDF link annotation
    • https://onecre.com/images/content/files/fojileguweduxitos.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/32989889612.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/luxaduwikupigugogikoz.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/xuwinarafikuniponu.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/vomadovugid.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/godatomiluzix.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/82459827790.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/mufudoroditipududufo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b515853f0---90858211764.pdfIn PDF document text
    • http://proxima-design.cz/files/file/jofilikuxamuwiraxa.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/76621898732.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/jabeloranelov.pdfIn PDF document text
    • http://termocity.by/pics/files/xawewara.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/tibitiketi.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/83302830029.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/16038312492.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/dutuza.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/0rhiu0duvvijjn2ej0mmo22r2j/xubisazeverus.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/redimogubopejabo.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/ripaxopatode.pdfIn PDF document text
    • http://wdnederland.nl/file/61036499706.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/64648213929.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/nixojozin.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210902040056.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613878c60ed27---rujazu.pdfIn PDF document text
    • https://webmenuplus.com/images/file/joxuj.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 10580 bytes
SHA-256: 162e36e54c3a686d2f6ca55964a9e0768394edf50c19dc45a859907c81f02411
font_01_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 19136 bytes
SHA-256: c13abd5d682f5c2b8c8a802d2d1e8cc7da6e4bdeb88586401e69db7cf799a71c