Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbd4dc22659e5d7…

MALICIOUS

PDF

79.5 KB Created: 2021-06-18 19:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b94bedbb287a28ab2f31a741ef141f3b SHA-1: 17f90d794839c7c2482a1354b9f38cefad4bac51 SHA-256: 6bbd4dc22659e5d75f0e47b188df98cc5b270fa5c1dba4cf5d5b18f007c1b7a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://medvor.ru/uplcv?utm_term=weathering+with+you+tenki+no+ko+download PDF link annotation
    • http://tivatijapan.com/uploads/userfiles/file/94621646471.pdfIn PDF document text
    • http://3q1p.com/upload/file/210603204835964770z7r2shgmuk4c.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b1399597cc8---13651677382.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210607_BB57D21335B2311F.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-18/20210618031004524531.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160972db35496b---86664747028.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/nodugiwogu.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/venudefopunud.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989fc9501a3---25092569517.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/69a8eb54ab161b0b6b6ecd68b96960c9/zisivudi.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/c95685289042d0c479de457c93ca2a88/desuduwarejewivowesu.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/rinugapusuvadaxeser.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/9096b7ba6dfde6ce54c7ae9b9f06885d/68033762636.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97feb0bcd---83517900160.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160731bb33014a---7200480866.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://schema.org/InStockIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC204 4352 bytes
SHA-256: dfcb7863a8a1f68704f2657aef52158c021428e9002972aafff1a1804a5f5c4d
font_01_sfnt_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 5180 bytes
SHA-256: 5f4c2c78e42a6add802b150fa209e1b3738f4aaf45d51815e9ed39a493950480
font_02_sfnt_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 4308 bytes
SHA-256: 981c2c88bf85bc373eacd9c371ee1f2eaeb0ab2b2e6b72a6a1920981ff163a56
font_03_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 11520 bytes
SHA-256: 729d69f24a6b3c2405cb20e6c88ce410f8db02cacf82bbe3f4dc58b60df34116
font_04_sfnt_off000117ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EA 17108 bytes
SHA-256: 1b17e0a9e169697b7c8f62428d8a4dd4fbc303d1ca74e5b9d2290abe4d62c4d4

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