Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edb8b754e89fb12…

MALICIOUS

PDF

78.0 KB Created: 2021-09-12 03:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cb12caee9eb1acf2422309ea9d9502db SHA-1: da25f8dbedeeb55698d8e8b3677c3777f2e86402 SHA-256: 2edb8b754e89fb12b5257ac0a6fc2aa0ed104e95807e323511e95e6654ac2bdf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The PDF structure and embedded content suggest it is designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=the+division+new+york+collapse+pdf PDF link annotation
    • https://rajakeempat.com/contents/files/fadabinasepifo.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/wikafupunopidudiwi.pdfIn PDF document text
    • http://carszana.com/image/upload/File/zumigis.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/45126905094.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/kufijitesolepozo.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/pudedo.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/watisowupewulobepawoke.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/vegixigekokeruxa.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/33470081053.pdfIn PDF document text
    • http://arucax.am/user_images/file/98094564571.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/wepekesoxuziz.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16139f9a1e9a99---52617509477.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/7962077739.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/44948549546.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/31102730230.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/57289692314.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/14694439166130c4801e66f.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/5670407795.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/7820656372.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/vexigijiwakovagak.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/simik.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_off0000c90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 18064 bytes
SHA-256: dbd72b5f2db7c295e3b380864996dd37d85ae362a4ca769c5eec6fdc203cbe07
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 10940 bytes
SHA-256: f1a92c5ca173409abafdaa20c5d0fb65a2e0be30d521984983fed1a4ace7ed18
font_02_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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