Malicious PDF — malware analysis report

Static analysis result for SHA-256 da19b454df38098a…

MALICIOUS

PDF

78.5 KB Created: 2021-08-11 13:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d204be60057f27fbfc65f4cc19dc6fcf SHA-1: 97636c5217b69b9ec06ddcd09c0a9a17aef2292e SHA-256: da19b454df38098ab88805d38044ab22ec5102b832421ea5801d2019be4021bf
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8b22e0f8---42527555739.pdf In PDF document text
    • http://au-zlato.sk/upload/files/49607025900.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad0594b78a---migaraxa.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/pazomuzinaluluxagejibu.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/28526804102.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/84404579386.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/88312628334.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895a3648cdc---bevarofu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/06bd8bd9fa8bdca528da00c2b7332d35/fofujuxemerok.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/gojobevinoresij.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/65432282005.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/xejalakudasewasused.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160be35ef03969---97911673663.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6c34dc0678d2f45fb33f0002f52f78f9/18445618716.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e581f64fcf---37224919768.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/71295554568.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/77788944579.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/58662131573.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/66186638208.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/79238390723.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160979e27b9984---2785893755.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/48823716986.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/bonuloxifabus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=strategic+management+and+competitive+advantage+jay+b.+barney+william+s.+hesterlyPDF 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_off0000c9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D9 17976 bytes
SHA-256: 7f91e97476fd912ab664cccef6f23547605146a4753d582a161c5505640eb199
font_01_sfnt_off0000f83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 11640 bytes
SHA-256: 8db4180facd9354f14445b5f58c9835b76cb0497007d6da1ee1f13d95de6ec64

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