Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9ec6e3a8725d7e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 19:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e1b022aa5a99f8a2c754ef66b4e26a0c SHA-1: 1cd597985e2fd99858bbf981cf9d4e26a2cf1c62 SHA-256: ae9ec6e3a8725d7e1ebba26983ccb979710da9faa27aeb1378e96378f83b6820
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to link farms hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=human+evolution+timeline+pdf PDF link annotation
    • https://betenrealestate.com/sites/default/files/file/pazajupiwusi.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/lulewolexajosedupok.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/xolevisomoj.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/jugexevasazobotuvejatezug.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/pjrbc555vlb737iujph1jbv3t7/wadabadomuxafofo.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/79837590107.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16114c93535e44---54247736057.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/tadosilosudofovuxijisolo.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/tewagip.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25ff213fb6---magidigiwamifora.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95175130193.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb0d21016---89891254740.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088792073e57---piwudonodazivosizemorom.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b588349bcdc---54180332190.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/redimetinep.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/botuduguwubudok.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/volikaparudugubuv.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sa74kdsj27q58ia0fiv7s3f2jg/dakemazumamepifupiza.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/pomazel.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/jutenoremezofirovafiliset.pdfIn PDF document text
    • http://voijin.com/userfiles/files/nofedul.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/408504de51c80e0558bf292e260c4a3b/20113541937.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/46652880222.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/gotipadonidefat.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_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 10548 bytes
SHA-256: d5dd738d610c9b68db4b7fcbe9203358c239eee481691ffc1eeaa532bee081d3
font_01_sfnt_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 17824 bytes
SHA-256: 3cca144d7a32eabf1e74fba7479845a9745796138797f65f09938f1563671436
font_02_sfnt_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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