Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ead33bafc1ef5f…

MALICIOUS

PDF

88.5 KB Created: 2021-08-07 04:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0d49c245e97d6f68ebaeddea52ce1bd3 SHA-1: 1d2b5c56bb38d5c712e98a6aef198ecd6702052a SHA-256: e2ead33bafc1ef5fa8cbeccf97c88cdb702bbe398d3aa85215a2b8e2314fa4cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggests a phishing or malware distribution scheme. The 'SE_INVOICE_LURE' heuristic further supports the idea that the document is designed to trick the user into clicking these links, likely to download a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=sap+sd+book+pdf PDF link annotation
    • http://czpohledavky.cz/userfiles/files/73004889468.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e0128158c---burapakogekotasimeni.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/465f2c8b401ddeef4380eef288b64016/47133594813.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rvnori2ao458n651n9l2qqfbo7/tulitepuxedifewajerok.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/xogidepulukez.pdfIn PDF document text
    • http://platcometals.com/images/file/2916830082.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dafb9268b7de3c74835774fd46d6551d/fidoxadine.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/juvigixe.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/36958362043.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gaxogotodalekujofoxulideg.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/joso3j6lnhnlahsbglicfe2amr/kudisujolujiwujejipomej.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/pijefetakobofu.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/viwowida.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091a59690946---woparekivutadilin.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/tutanemesafubofod.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/kaxofuko.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///jadibejoni.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/niritot.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/3fdg9hkldoqi97it0vh6iai1kp/figixuzuxigol.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/5q1sk91401hl9jfr4lnjhc55lh/89369487237.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ta74a8ubdlgb7elq53tt34kf1n/torutunixeb.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_off0000f9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E8 16644 bytes
SHA-256: c42f286ab1479381a19df9141d1b3ed959851366926e58fa6d54bca6ccfc6989
font_01_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 10224 bytes
SHA-256: 41a512b75ca272ca02af949dc84151dbc1f0b84864bf86ccc677315d1043ef9a
font_02_sfnt_off00013c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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