Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e2fe5b3b36eae6…

MALICIOUS

PDF

116.6 KB Created: 2021-06-27 08:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 171278585eae8faf6d7f23222c660d38 SHA-1: c4f6170d11923a14aa1f06198e3e293c85195498 SHA-256: a4e2fe5b3b36eae6cc48040f6ee303ebe57a541bf3e14da0dac2f1b9080872a0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://zionapostolicministries.org/uploads/file/puxeg.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/24409210884.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f4f89b357---47536154146.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/15003273636.pdfIn PDF document text
    • http://placc.info/up_image/balokamoki.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7cf4e0aa0---53191794506.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/719a6ba90cf43c2af69c3f2cf828ba53/kidodesi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fn5r87rdfkuvlsqm26fgtn1453/56501575863.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a96c2488e---91673080368.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/80858874116.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/welusiro.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/766a7092e40f074e82fb9a255c3a8711/28626139396.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/9he624bdek2rffqt8fu0081mor/radikanozizatexolumuwig.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/7804q5a1kmsvu3ftidoi7pia00/wulabim.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810cc8db16c---zowujabunofegobawo.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/49b61f068950842ee12d1825a13929f5/35081867032.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3de42d94d649b2b3d56e1e1f322c0708/lizevakejo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/lpd1b4j2evhkur0k30gs7qf3qr/jikudoxunujabesarifukuj.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/wulafuvabexunobade.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094697d58361---poguxokororamabos.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ac6c098ce---23587828741.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17b46d41a---fasujodanuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cursed+fig+tree+in+the+biblePDF 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_off000167cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167CB 10624 bytes
SHA-256: 17aef42d665a397846ff9f0fd735117b9c9e02c51cbccda6d436d770c43c67fc
font_01_sfnt_off00017fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FC5 17384 bytes
SHA-256: 23235537f62f10b94d970a60e5d4034d2fe6e10b48685e62c9838956b7ba415f
font_02_sfnt_off0001ad19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1