Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2a7ad8d2f04e76…

MALICIOUS

PDF

69.4 KB Created: 2021-09-20 02:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 362a3833fff2b9acf4ee8fd59f8bf640 SHA-1: cd10365c0d9a13a66fb741314ba9170c1dd29a04 SHA-256: df2a7ad8d2f04e769925cbb09500487b77d2c349a1d3d081ec112683bca78fab
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The presence of numerous links on potentially disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://purefeeling8.com/data/file/pawumeze.pdf In PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1532a6a0---20828968789.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/11465889674.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/nuwukivimiwefigoxo.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140041c4090c---latalebabenuw.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142bb457d67e---lorevojugajas.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/6692ee3e84b5fed774ff59576d952e97.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/nobil.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210913081103041698sla2w.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/zaxidudelatobi.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/92161610679.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/jepused.pdfIn PDF document text
    • http://yjccnc.com/upload/files/wixisofo.pdfIn PDF document text
    • http://cutskytools.com/d/files/ruzolaxizakalufuxikutarop.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/54542064920.pdfIn PDF document text
    • http://evola.it/userfiles/files/99524366792.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/55ee07c8bd0071799fc6eb9a46837190/71436702172.pdfIn PDF document text
    • http://venkateshservices.com/uploads/90771329776.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/rasusesasamukuvonuvuladu.pdfIn PDF document text
    • http://xfswchem.com/upload/files/65243456193.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/pomub.pdfIn PDF document text
    • https://sinarwaja.com/account/files/77926372503.pdfIn PDF document text
    • http://vucert.vn/uploads/files/59640300717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=lego+juniors+questPDF 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_off0000affd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFD 10408 bytes
SHA-256: 2f8e3f032d0563b5be500c5bf6a74d6b9004ce8cecc87018bd169dff4c3f3404
font_01_sfnt_off0000c75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75B 16056 bytes
SHA-256: 330d4db3ff1051006e3245904e0be6b204d185bca1c479ea1101bdc823127d58
font_02_sfnt_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1