Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bd72ad2a595f31…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 03:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 57d49fef585d368b65b779dc15ce01a7 SHA-1: 84571f8b6f8a4375a28aa1c74951632fd2b65c72 SHA-256: 09bd72ad2a595f31f3362bb45e7b6bd5d54c094736a5ffea9b93bb76247aab7a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external sites, many of which are hosted on compromised CMS uploads or disposable domains. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=how+to+bypass+android+password+without+losing+data PDF link annotation
    • http://pharmabiosolutions.com/filespath/files/20210913204544.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3e5a884863233b591759b603a81bb7c6/21606300913.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/nozuvoxuxijolu.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/13454332915.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/34626975431.pdfIn PDF document text
    • http://wsm.hk/images/files/3349047953.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/67160b02a3540f768a008d38b801cdf4/99475813202.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/87784227956.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/foronuvawaxevunadifi.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/ziwodefujolafu.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/49332356193.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/tuxowovaginunagixu.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/3699833043.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/28874105893.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/22723c572d414328377b2e59e6268bcb/rudiwapabiguzajinubomono.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/65850330143.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/digulovotonitigiv.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/zewunin.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/54g0et14ulfs8aq7o0rpv451v5/63995363264.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/38403972651.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/59025010267.pdfIn PDF document text
    • http://bushurov.ru/images/files/18097809697.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/niwasege.pdfIn 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://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_off0000d21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21A 18056 bytes
SHA-256: c0d47afa30d2692f5f53db6583c6518e0392582b2e7d72706f4cf70da23b29ce
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11933 10968 bytes
SHA-256: fd32f5b031804a9cc4d37109e5e35ae7520079f36e3a4e18f938ebf24e13160c

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