Malicious PDF — malware analysis report

Static analysis result for SHA-256 574eb3e8abbc8390…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 03:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eacaa840f1e02f9039f32025ef877b42 SHA-1: 281430617c8465f4e91abe5f61c5c5fe10aba625 SHA-256: 574eb3e8abbc83905834ac6a339f025b02c4314bf04ad9f759aad5e641ac089e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7ae3740bddb5fdc2ad46eeb05e05291d/jafakuliduwugaxaz.pdf In PDF document text
    • http://93564497.com/userfiles/45640571105.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e892d2019---bavuvotuni.pdfIn PDF document text
    • http://giga.sk/storage/file/5441487132.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/pamuga.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210612110441.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/54808801642.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/22132234718.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d44dbcdd---91941682290.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/19282049480.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/giwumulozirefabox.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16089c2b18c2ee---25054259965.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mlcu6s3r2b96coq6tspe79rhb6/31063682447.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/49c5fec4433375b83c1708b4bca0a17a/27754330385.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3jribj91ircvjoe7u86hm6c6q4/37674963850.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/00be9cfc9e75b8b8b7eefa20409bf4d7/rorowovexuxalapig.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/fopevodelof.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41a1076703---17532632542.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r1pv967sjrmsu3ml1669eqedpi/39448827787.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b11fbd7cb4---44834277577.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/74287191906.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/gemijoven.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/56170891721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=exclamatory+sentences+in+englishPDF 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_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 10876 bytes
SHA-256: 716aaa4065125d183d3a47b77230cd322712b36dff0019f22d60b9f13d4aebd2
font_01_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 17408 bytes
SHA-256: e050ed0e7134ad6ac27b170c82c17b85ec4dd711958f12a6386055377fed9819
font_02_sfnt_off00013319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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