Malicious PDF — malware analysis report

Static analysis result for SHA-256 1789c36b984e05fe…

MALICIOUS

PDF

81.1 KB Created: 2021-10-12 08:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 43f2f34c56bcb721b8d0f6b0f52202b6 SHA-1: 0a6ae5b41dfd11f6bfab4a413ad3ec67c78e3574 SHA-256: 1789c36b984e05fe8447fdd65f724331b4eecbbb52870a5e5c70395c73770d7e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vaynhe.com/upload/files/9610831219.pdf In PDF document text
    • https://flomogroup.com/upload/files/35611768921.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/e88ea18a1ba799c5c2435c14a4b81407/74409782717.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8b91e0d31d267aca62a51cd8f386daeb/lorizikomud.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/21233167813.pdfIn PDF document text
    • http://japhina.com/upload/file/novugezu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16142ffa2c5357---jazokuwenidisawelelikak.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/60554920880.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462e8523df0---misekewe.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/wenof.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/wusababitumezuk.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210902031717.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/xarubifaj.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/1a32a81fca6dbfc17a509911fcf505a7/55793488605.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/mipelal.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/zerikumugilikaxe.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/vepepozerifomera.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/jepizeweridoku.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/miwezifaxegisolaxamubidu.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/kazefobupabamefow.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/wixubipefanulanobepas.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/abc8de62777379c0f6f8771c755dfc05/zalegadakigemotedas.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/boleweluk.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/EqozwcbAC44/uplcv?utm_term=coaching+directing+supporting+delegatingPDF 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_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 10924 bytes
SHA-256: 23919a0cfdac2ecb9f74b3242b1c254eec0b8e6a11516b355f4279ddd24be966
font_02_sfnt_off00010427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 19484 bytes
SHA-256: 5d4935291025cbcc7149bbf74c932b3a9913cb0a9ae8800a44295437b6421810

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