Malicious PDF — malware analysis report

Static analysis result for SHA-256 62875af7d6022b6c…

MALICIOUS

PDF

76.1 KB Created: 2021-09-24 19:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e0d792c8a2430cf0064eef1c675e941 SHA-1: f501c20c17ddb9aab372dac906fa783cfa1324bc SHA-256: 62875af7d6022b6cd11b80f8fddbf98a2c55407d0bdddcc362da726ccc5b7cec
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This pattern is often used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://facades-et-traditions.com/actualites/file/numumufa.pdf In PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1b99bfec14ee53a4d43de257a52aa004/vixowedukalalavumad.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/raveluzu.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/19028524801.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/dabotepunajolunulamanisi.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/5379707424.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/zagemalu.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/81506579499.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/19500773974.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/21327608262.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/kuluderuguvezufebelut.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/34210534455.pdfIn PDF document text
    • http://denizyemek.com/images/fck_upload/file/povixupe.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/36326271697.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614882a391e57---2344486874.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/29371124119.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/23919027073.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/mowar.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/sunodutibadaxezutepud.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/e8141ae496f957507f3090fbdc8744de/saziwufazatepu.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/96176598319.pdfIn PDF document text
    • https://ccskin.com/geektic/files/86812099692.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140012e9304e---93248527186.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/rijigiduxeduretemapozi.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/49669878229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=subway+surfers+pc+game+free+download+setup+windows+10PDF 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_off0000b906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB906 20160 bytes
SHA-256: ee73f565ce18d81e4a89cd99dbcd05bf15018fe8bc559414312136f7549162c0
font_01_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 11652 bytes
SHA-256: 29b030b1a082e49d93b85144dc77b8a7a2856acc7f763adf1cfdb4746146c944
font_02_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1