Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ebba26a4af7ce1…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 22:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b81973cea48123316a12cb764828eb67 SHA-1: d8b90b448670525cc6c739686f76dab31d502c41 SHA-256: 04ebba26a4af7ce1144604472c6fbddd324c1bcbb953ac00af497fbf7fd52433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm for phishing or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://ecompletecontact.com/ckfinder/userfiles/files/34275524263.pdf In PDF document text
    • https://noddy.nu/images/file/lojixofarijujifozife.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/sidakudo.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/wowikikigijikexesuzogen.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f1cf0b7e---jowutu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160fd79b2d3398---watenof.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/tekufukupibevelibaxalaru.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/31400566220.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/petofoxidafegofiwuwigidol.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/46893482100.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/95853764146.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/vinudeputubexusesa.pdfIn PDF document text
    • https://seikico.net/img-tym/files/mologezufewunulubizizeluw.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/35613050645.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/89d43bc2111568c967576bc693c89c7a/mesizezali.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/95785086028.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160febfc31520c---19583356213.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/90352555069.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/63335624247.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/85468552668.pdfIn PDF document text
    • https://cardolf.ro/files/kikoxomefajazelakaxuw.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c18d34622---96015622684.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a3e6285c103dbbf322788f4a723deb33/81777468876.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/7505487999.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093a706ede54---tafulalazabuvenanu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd1b717a41---kodojivijudetozekowok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=loan+agreement+format+pdfPDF 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_off0000e24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 10492 bytes
SHA-256: 1340effa67cafbd7ef5a75aad34fa5c3f376129c921fee9f14bec519e578e8c0
font_02_sfnt_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 17236 bytes
SHA-256: 9746f5155bd947d9d72205997a70f7023fc73939749f4c06cad16b61a69be355

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