Malicious PDF — malware analysis report

Static analysis result for SHA-256 139809b0e61b13e1…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 10:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 314afbebad99801aa0b4a98500f9fd51 SHA-1: 6e9c578f0cf1399313b34661d8a3f5e3398d4510 SHA-256: 139809b0e61b13e17837d2ba9cdd0226edeaccf00292386499c381a62c02cf1f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains embedded JavaScript and functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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.
  • 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://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3a119174dc38292b4ff990d6a2acddaa/27280227055.pdf In PDF document text
    • http://murasakijr.com/uploads/files/pulaminilonajisenonag.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/65355523066.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a682a8e89874753ecec0b95e411ab657/gasojigivumowebezojix.pdfIn PDF document text
    • http://meta-min.com/files/tidamoganatabetafuxu.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/wonunalota.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/44721698711.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/weteguriteda.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/nanoranawazadodovepebefe.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/21066171517.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381415a18de---99444761669.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7f388d1befd6fba98f54d6b4613a2230/8570414873.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/vililonuwoxolamofo.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/28686028140.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/funifejutironazoloriwejuw.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/23974636969.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/pofuxavaxa.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/67280789541.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/63337200303.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/xonazabofatofuf.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/34524439986.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/zakukomisetojagomekado.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea14d562f5---xejuvuxolilun.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/36878712418.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/zunazabalikowoxuje.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uiuqovldca593ni28cb48lllp7/56659335210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=brother+in+arms+3+apk+obbPDF 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://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_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 17628 bytes
SHA-256: c6864373937300c9949a216e781b133b7a8810109a1d56e386fb8beda428c58f
font_01_sfnt_off00011042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 10928 bytes
SHA-256: a22b56c74a9f5b5ad038bab4068ccec167cd8c01aefa12436ce81ad86bdff089
font_02_sfnt_off0001293d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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