Malicious PDF — malware analysis report

Static analysis result for SHA-256 532a6c35fbba67ec…

MALICIOUS

PDF

71.0 KB Created: 2021-10-02 20:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6856f6228decc83a1c7590b9d527caa2 SHA-1: cedbd11f137577dcab028764097149a1c219f338 SHA-256: 532a6c35fbba67eca9662cb16d52d94c6c6cb8791257155a302393afb05df90a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags this behavior. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. No scripts were extracted, but the structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=international+journal+of+urban+and+regional+research PDF link annotation
    • http://op-gold.com/ck_image/files/govexipokalenijivane.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/mofowejugarub.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/68529096628.pdfIn PDF document text
    • https://athenaeumchessclub.com/ckfinder/userfiles/files/kabilimujipesex.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/wejudegerulej.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/felefoli.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/36424013233.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161396f775e5f0---sememivurukuzovod.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/zedegike.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210928053145.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/41721564654.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/27970132025.pdfIn PDF document text
    • http://gibisch.info/files/files/74756636156.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/rubajobisafanuxu.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/dagaz.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/juxer.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f490455c05---fewenibu.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/73731729271.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/dekorififisuregoxarufuwip.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/janegifusifowugorap.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/zukufurakagezikemazegizo.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/76768948789.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/kemawozod.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/58790913433.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/99741892281.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/kizejitinelifaxuxiwuwe.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_off0000b318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB318 11076 bytes
SHA-256: bd0f70a03e24c42faf3795e81fd3645d3e66c9bf3e9a6f165453cf622c30646b
font_01_sfnt_off0000cc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8D 16192 bytes
SHA-256: 2feb8f84ccb7aee09c07ee74dae4dfc635f44402e57aafcc512d361dd6ebe167
font_02_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1