Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ed7837693b485…

MALICIOUS

PDF

75.6 KB Created: 2021-09-18 00:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 205992ebee89a0d89bf1acfa92ac7940 SHA-1: 0e1e7f5b60157cbc950f96a411a67755b3880214 SHA-256: 706ed7837693b4852c2c4931eb2a9bd479eae4ca4bb5206a3d0fb939293c56d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=sticky+notes+windows+10+for+android PDF link annotation
    • http://www.offshoreyachts.net/web_upload/editor/files/15436292313.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/fekine.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/28610487941.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/pumoxosopijezoloxigige.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/dedezosepon.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/devudijuwodajavubipifofaf.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/fabijoxedovipubakijanesem.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/junugiloro.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/lokaf.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/potuw.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/bixagufaferebis.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/43901353725.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/67474107285.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/93278949952.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/19104948242.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/2705668414.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131bbb84bc3a---zinibigevujipi.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161315ae4f1939---23102252247.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/11564807777.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139a9f5e87f4---82891617989.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/sobedojaxen.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/1773848797.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/32942620755.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/52738934151.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/21967379070.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_off0000c1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F1 10964 bytes
SHA-256: d6c6458efd8ab2d92b479063ce83bc58f6d46524aad63f741430aaf8fafcddc4
font_01_sfnt_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 17440 bytes
SHA-256: fabb7a29eb981e8cbaf41b356d553b008c93fffa9a86b9f7ceef5e123c90a6d1
font_02_sfnt_off0001089c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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