Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ec7e10e3d7ed03…

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 22:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: faf92869a31c23c70f8eee8ccc58727f SHA-1: a2b38e032ac28218d5b8286125a1734ec410c4b0 SHA-256: 67ec7e10e3d7ed0312589dbbd3203a2f70f225d9412b57281e610f68e7a73849
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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 http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608513ece57c6---keworoguvetetuw.pdf In PDF document text
    • http://presssimayeshahr.ir/pic/file/853180314.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161260172c4c23---revijefegifava.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d77a73457---85010002149.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c83044ed---76035206730.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d32fcbaaf16---rezewiwowigufavovuno.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/karadedutatowulijedav.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/64910472989.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/31700324112.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/33456162558.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7353bc11a84759331b8ca55918cf408c/90545465915.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/076706f1a71d09cb9e92c8a661296f42/wewazimezekira.pdfIn PDF document text
    • https://kawanmto.net/contents//files/taliviribabikarogodu.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/21484764483.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/36979973582.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/12496779470.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/navisugakegisakojugifo.pdfIn PDF document text
    • http://fitviewer.biz/files/file/nubuxatafatawavizatu.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/59814328351.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6387cd29a7e4b03e8c8efc4a622b447b/tixatumarobabodixegebina.pdfIn PDF document text
    • http://generoussecurity.com/uploads/sesawajeberojutikokebakit.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/64903925517.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/bemoxuvumuf.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2645ffa541ce491daf4acad191687e1f/punerazetidinemito.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/bowerujutesedux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=trivial+pursuit+fragen+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_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 10680 bytes
SHA-256: c48c517fd6138f9e65f393ca02e575f8909de4bb5d3c733f39be15e2348e368b
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 19356 bytes
SHA-256: 80fad288387a66b89d7257239e52b70c5ede57d5127941c6bc5fb36877665aa1