Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c00409c45f0225e…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 13:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8c386dfcb8c3cc63928d967ca19fbdb SHA-1: 29f6370b92bb0b643057dd2edbf759d79c0bc834 SHA-256: 3c00409c45f0225e0c4cd6c9758e66ec3ec4b0f6624cc1d68c7429a4109afd3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which point to compromised WordPress upload storage locations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=how+to+see+who+added+you+on+snap
    • https://vpntraffic.com/upload/files/pukep.pdf
    • http://angelescare.com/userfiles/file/niboluvajaxiputalulapi.pdf
    • http://shipagents.nl/uploadfiles/file/7370772635.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce710dfc1---zuxopowikepeg.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/p1btng89dodt0haqmvp7sdpvep/29270837715.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9fbb05194---53168194456.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757f8656039---95887288664.pdf
    • https://mmszke.hu/files/file/zetide.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e332f7ee54---19990928592.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609568e44026c---gawazavudafesi.pdf
    • http://dioceseofniranam.org/userfiles/file/lixanugabivi.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7518584acb48f131c78d9e6cc435d136/39438335632.pdf
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/gimaputul.pdf
    • http://stalmost.pl/userfiles/file/70407017634.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d964170ad5---burase.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607371e046519---duxabexobujaxisiromep.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1ee769bc2---54911532468.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c827e4f9580af5fd3cfc09a00e537056/vogezot.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d30c76de71---71617812721.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b4d95274---musene.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/915e1745687e436476c1af189920562a/tezirobo.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jk3ea0tq98udke9t4mlld9acnh/zesadudideve.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/9d16f54f08cc8bc8266e57dca82fe1df/wiletomeporesomulal.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ce.bin
835f0d6e1109ab5d31173b91a7e46c0d4ebd6cb13969ea5ab5b307bf175625a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 18024 bytes
font_01_sfnt_off00012759.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 16792 bytes
font_02_sfnt_off00013f70.bin
a451b062c3ba6bc50a11bc52322ad3395f457434bbd845920a8dd2c07e0d6b94
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F70 10540 bytes