Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dd06de2d5e6cd5…

MALICIOUS

PDF

83.2 KB Created: 2021-09-23 00:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fc69d92f7359df605069851aabbb99e6 SHA-1: d1f2d0bc014b6249c406ddae8bb66e8d88908c01 SHA-256: 24dd06de2d5e6cd571364b27c5e8f6ba795f24dd5f8952de935d5b19effbf238
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external content, consistent with phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://pistant.ru/uplcv?utm_term=code+driving+empire PDF link annotation
    • http://somsit.com/ckfinder/userfiles/files/dikivaxufibo.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/fegudakonudivikalotudo.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/pigak.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/ralewe.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/jakawuxigo.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/76719389493.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/ratavotazasofulukakozu.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/lunujimebop.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/2102566500.pdfIn PDF document text
    • http://yongqingtech.com/d/files/xelewipogozapajapalusuf.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/foxijataxototukopijusaw.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/dopugeriduso.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/zipivatokasi.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/96862644071.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2db97d760---31944325533.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/kozopavanebuwopun.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/viluvejenetujezabu.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/77735249030.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ecc14be0f---xakudezezorow.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133648dd8b3c---57023287624.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/belutewos.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/16310477708961.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/59863543214.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613f345956078---lusilaponas.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/37212935046.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613886b822881---61142107683.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_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 18072 bytes
SHA-256: bec2a948612728bb24571cd22554abbecd994886ae303e530d953d2e40f7613e
font_01_sfnt_off00010ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12808 10356 bytes
SHA-256: cb53f4984891f738330b2033253d7a46bfc508c6686311693e4577eeb62600b4

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