Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e19f157a9112d5…

MALICIOUS

PDF

91.8 KB Created: 2021-08-11 13:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 28a4fc77594c0c795fc1121f66614c64 SHA-1: 98b12ec878b508b9c1135af5685770f1eeaad99c SHA-256: 26e19f157a9112d5461479901d7d6306443483a198f8c0d09c31354388cf85f8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cructi.ru/uplcv?utm_term=how+to+transfer+contacts+from+verizon+lg+flip+phone PDF link annotation
    • http://np-laser.com/upload_fck/file/2021-6-23/20210623114748689753.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607517721fca7---xilexugegado.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/76728227747.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa2d6299d6---82334531957.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/ximomabofeburofaxubomoxo.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc883cb9b5---fesulon.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4764f40c7---pelufarefon.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/budizi.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9903cbc40---gavigidegoroj.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e995c4a37---gazafebubivifosixexitiwe.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/zulosakabidap.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/bonefos.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/1fea7bc9a940e2320cb75785a2aca335/pojorunatigiwixev.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/70923974928.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/35463689444.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/4091677058.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/98479189906.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/as46ogitfprq9ee04lsjd8kc0o/jupotoreboxojasubefaxumun.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/marixuwex.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/23504020510.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///51171086455.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b62c75e644---xuladuzejadabozilipuvibe.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8be65cd83---20536455625.pdfIn PDF document text
    • http://hainfelderteich.at/18938737005.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_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AF 18620 bytes
SHA-256: 28658f99d510fe7bc75e283a8968aec89c0e7af61eed8cba1acaced9f8480a72
font_02_sfnt_off00014676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14676 11128 bytes
SHA-256: 13719151603636894b881ed1779c355c38ff8b177750a1c51fe0cad8aa73f154

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