Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b10174a06d8fbf1…

MALICIOUS

PDF

80.2 KB Created: 2021-11-05 21:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6ff860c7a28166a3c1fc3b0d43f99980 SHA-1: a826c6268cc108a87a895207f45826376d3682f1 SHA-256: 0b10174a06d8fbf139c5f6750a9d045ac0b8164735721305899ee96c1c50d076
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous external URLs, several of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://agronlogistics.com/userfiles/files/82283402606.pdf In PDF document text
    • http://asavn.vn/uploads/userfiles/files/bokoti.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/52524616000.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/sozununepigubu.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0f64a1c1521df00fd7983e72c52dda0e/95927750769.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/44713102584.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/95acf02df2a6c2a649e9905962f3ee03/bolifudolewofodal.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1616a2fe2a1547---23522831236.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/jegev.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/zubozatavirulufadosopiza.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8c2f8e5fd0e0891d9187a5cce8356d0d/16409143523.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/bewufulisobinuwarazoxuw.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/15606239378.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/wazixepubofuzafumeregugat.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/jevojizobexez.pdfIn PDF document text
    • https://spyboarcams.com/files/zipisofi.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/mavalif.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/1682410354.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qtdgvtijdku3kgb2f9pjfq30b2/donime.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/97568371242.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/jaxikaxikopiva.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/perimezijebusumumusu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/Z3ufxtS7Wvw/uplcv?utm_term=cunning+single+lady+ep+9PDF 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_off0000c944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 21372 bytes
SHA-256: b053b2c8c299dfcf9573b6325f21feab41706d8cbc283d48f7336fb01bb8f7e4
font_02_sfnt_off00011995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11995 10660 bytes
SHA-256: 4612b5d6819200a6cc3d0baa1f4fa68a4ff58562a2ad4d8810c62520a352920a