Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee160a49d70a961c…

MALICIOUS

PDF

96.2 KB Created: 2021-08-10 05:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7093b27c2b0ed7bf5d59faa23b986d3a SHA-1: 9684748ed650b208a87be3a77a4593633b551493 SHA-256: ee160a49d70a961c70aa44a2fecd0b5062d2e2703a470f9ee53366791b178e26
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to multiple compromised websites, a common tactic for phishing or distributing further malware. The presence of numerous external URIs and compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://affordableadobe.com/ckfinder/userfiles/files/93422746399.pdf In PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090539abd6ec---saxibekudejifo.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/46724564629.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/8i3mp9sp0tvfv1rcgi3l8fedas/bugulezujavaririfove.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/xabegabon.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/65594519669.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f337abe58---57779461614.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c46f49a2a---70799646512.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/14392180599.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/gixemoxapibogapidabajo.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d3972499b75---jitumi.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/1c674414a44d10dfc49cd74dd04ca5a1/32794728427.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/49845330211.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/xitelomiseta.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ca3ed45bb91b4637f8c51e17bd5e068e/rijukawolajivo.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/53469428726.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/55560655646.pdfIn PDF document text
    • http://ubest.ru/images/file/89115890999.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/zulibogegusafobezorimu.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210610145506.pdfIn PDF document text
    • https://plasy.com/uploads/file/14445397736.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/tevavanabebitifufotu.pdfIn PDF document text
    • https://artbynela.com/uploads/file/witovezokawigojeme.pdfIn PDF document text
    • https://soliangco.com/contents//files/momilitave.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/67r5tpghnmn3gvat8ttgf19v0j/zafujapomadusirapewonaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=who+is+the+next+smash+bros+characterPDF 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_off00011333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11333 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4A 10684 bytes
SHA-256: 36665cee81dee9a1d15e54e655f7f6ea97860b26e87f54c95e7c41a7b3fae760
font_02_sfnt_off000143ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AB 17800 bytes
SHA-256: c5c7f55db7bed04a6cde0b278899f5264a87df12b6cdb53eea7d8125433bae32