Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7e5110faf522dc…

MALICIOUS

PDF

75.0 KB Created: 2021-09-28 19:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 541a0446f369c5a08d9525110cc82dd1 SHA-1: 954c1a791359d8bbfb9c0e9d792a59b616b8abcc SHA-256: 6c7e5110faf522dc7fefc43fae202e83df237b1c2b986ae6e27cc7c4d31dfbdf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with a campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=how+to+get+data+from+url+in+android+using+json PDF link annotation
    • https://gres-k.cat/userfiles/file/9487171630.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49334028142.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210911_073208.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/91433193307.pdfIn PDF document text
    • http://dgkno.cn/upload/puvodofofu.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/60484300971.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/kigewusidenu.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1645b7765---12842744178.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16149f483e1ba8---ranumasa.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/64427754630.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/75708532852.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/28060567040.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/wotokizapupopoba.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b77bbae4c7---56495784269.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/24534705907.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/kezotet.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c346e9e279---bamolawufejika.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/19011029106.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/60354708206.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1631987256gasibixiwafibu.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/jiwol.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/63595435803.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/8054348590.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/36138118151.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/pejupotakipawerupaduse.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_off0000baa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA1 18876 bytes
SHA-256: 0e5e95cfd0b67f36b542876f9d088381fa0c448666f6bffa85534adebf153429
font_01_sfnt_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 11004 bytes
SHA-256: 2756cc0f2895b854eb3879c1a2e9db4e36881530c277d84c5c139488a7147aff
font_02_sfnt_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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