Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0488caccbcbcad…

MALICIOUS

PDF

86.6 KB Created: 2021-09-09 00:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 55ff2841e535a7eb7c6c5ecba249b974 SHA-1: 41e11023dbe41e67589d2eebd0d35aa18b9ec087 SHA-256: 1b0488caccbcbcadefa5ab57202ead87989b5fb0ce38f244bd926841793d6645
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613927a7855d8---53634821614.pdf In PDF document text
    • http://synowka.pl/galeria/file/surukopevimetotapazix.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/kebutixexofasifo.pdfIn PDF document text
    • http://chinalabware.ru/d/files/71353884117.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/19593653232.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210901024802.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d3ccc670a0e5ca8248b0121c2e618838/magunasekimekije.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/8337078566.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/85951955098.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/xibegajejomofekep.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/86767519718.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/diruwuzirawotululimasisi.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/rigaguzewef.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/telin.pdfIn PDF document text
    • http://machulski.com/public/file/5598778115.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/29450026377.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/52123209764.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/47574546164.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/gifibetunomodaxo.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rakukumexevubawad.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/88653422806.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/89566646960.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/65797507018.pdfIn PDF document text
    • https://phunhai.net/upload/files/53806470964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=install+apps+on+firestick+from+pcPDF 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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 10684 bytes
SHA-256: 2c101312da4f60df07447cf749f799d45240d18b3819774908ef1a6800d173ce
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 18480 bytes
SHA-256: 995b8c8bc37bb9e3494f4863f285851f22ee755121a78337d13deb00ad8d1584
font_02_sfnt_off0001342e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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