Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd289e7da789ad55…

MALICIOUS

PDF

90.5 KB Created: 2021-06-22 16:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f37cb863d6df70769aaaf112661563e4 SHA-1: 177038a08b8439fc31b4018e1f74a5a18da24282 SHA-256: bd289e7da789ad554867d8457684b57f0dc675106e95a631c987c8e21665d5ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable hosting and compromised CMS upload directories, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to "Fairy Tail manga download pdf", likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://thevelascofamily.com/clients/11614/File/toxoj.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9134914682---21235187112.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf887c0b1de---76448724038.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/dovuzik.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9b35d4078aca0352fb8c2167e1461350/84335463351.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/kalapufuzixifebubawa.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8309ab6427ed1e47dcfce38ffb237dd6/gakuliwewutasugefew.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bad487bffb---kafedojabuvogejero.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bcee2ebe08e---vujijob.pdfIn PDF document text
    • http://airsoft1.ro/files/file/luturu.pdfIn PDF document text
    • http://kleiberit.ru/files/file/sedupawonubijofixerak.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/bcd14f0247f1f7f86f4d8c430a02498d/bumejiwegolisijalutumitob.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e13423521a---25006090964.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/n4bh4pjmioha1ahdafph3f7g86/28952108515.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/mebonopenebasakudovufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fairy+tail+manga+download+pdfPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDB 8928 bytes
SHA-256: 4e81d1f9518c83d8a82ff6a31bafe23749a690a8406aeed04dac794881ea031e
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 5332 bytes
SHA-256: 9a1bf52e1d809616e5e470bca9c5f512c0a9655fcd602c999852873207123937
font_02_sfnt_off0000fc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 7848 bytes
SHA-256: 061d610e79c95717a7f71591b578af006fa0cac563ba0a409ddf488c7fe21d44
font_03_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 15236 bytes
SHA-256: 1aaaeb1d63596df2183f0f11980b7dfad0d0f76187dd7d169b3cb88ad6fef943
font_04_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 17800 bytes
SHA-256: 3625dd566c029cc18017a69e1b44cf7030bae6a2510ea4e4076703e5efb3051c

Open this report in the interactive analyzer, or submit your own file for analysis.