Malicious PDF — malware analysis report

Static analysis result for SHA-256 701492239783e914…

MALICIOUS

PDF

85.8 KB Created: 2021-09-17 20:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 197d8177ece5ce761d3688f0fa47c272 SHA-1: 64720218ebe4f7df2e6c26dcf06f56e414e7332c SHA-256: 701492239783e9140c494efc9c7586026744c7f13b660662eb94bb7e92e0de5e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

This PDF was flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. The 'SE_MFA_LURE' heuristic indicates the document likely attempts to trick users into providing sensitive authentication information. Numerous unknown URLs were extracted, suggesting a link farm designed to host the malicious PDF or redirect to further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://konberdbio.com/upload/files/mejiwe.pdf In PDF document text
    • http://bebsulmare.com/userfiles/files/lejipuw.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/gefor.pdfIn PDF document text
    • http://bdn10.cz/files/file/tenewap.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/matip.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/96192100107.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/tojarususa.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/kemuw.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/77689287399.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/58300095915.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/17211073857.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/lagaxomisekigokagejaf.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/55979528269.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/g59g53hntpeegku4ovloan8g4h/geladitude.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/gilib.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/23253508654.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/nirabezerivojinivile.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/lutujivazalelevomamireji.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/16958591158.pdfIn PDF document text
    • http://merwepizza.com/upload/file/juberolefavumas.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/43704220417.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/51091935506.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/15292786990.pdfIn PDF document text
    • https://exclusivelimoservice.com/ckfinder/userfiles/files/47600178723.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109132204569440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=can+we+play+android+games+on+laptopPDF 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_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 18260 bytes
SHA-256: 724822db89a5f56c6bdd598e34d14e1a85e20929666a1ae3de81fa8393aac061
font_01_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 10968 bytes
SHA-256: 698bde072057faa5832db7716cf08b1c63d0b58985b5785ac7337f37230dbd33
font_02_sfnt_off000130ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1