Malicious PDF — malware analysis report

Static analysis result for SHA-256 00736f1ef32245a6…

MALICIOUS

PDF

83.3 KB Created: 2021-06-27 09:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8a44872226b15f17b7727a288d873772 SHA-1: 9ac54a2a26a4ab8be243a067500ed5d54903258b SHA-256: 00736f1ef32245a6adcd109cada2a4cf4fa933f2e8cc9d49b9a0d4198c090c9c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_INVOICE_LURE' heuristic and numerous links to potentially compromised websites. The presence of multiple external URIs, including algorithmically generated ones, suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and link farms are commonly used to deliver second-stage payloads or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://garglob.ru/uplcv?utm_term=non+payment+meaning PDF link annotation
    • http://chokmanee.com/userfiles/file/17356577622.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/81744912187.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/a8657bcd91a67767da45e293dada52ca/44749974810.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/mujafobokudo.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/ee38b6723f4f0b4211457f8f88b1cb70/xutukudejigedokedolofu.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/fcc6f487640b421a9e037324c02f89ce/kiwejafoxiw.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a60d67ca7d---sutaruleko.pdfIn PDF document text
    • http://dakmet.pl/upload/rabizepizezegejobogusade.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ab84ae26b---74691031769.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3ajn0vo9180ab3run6kge7tda3/69487532430.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/34395496537.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/241f34245bbd05a7b0c0ada12658a7d2/76998887909.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/xududidati.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/bupalatu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/63283354386.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608103ced1e64---palupesumeferoxokeruz.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/zupupo.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073b4cc9b131---pijate.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/zezujodeze.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/xisisumibikal.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a77233ab---98423735484.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/aqk94dgl03502s0cbu53c39pf3/fikavufejedulazixibagez.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/vodakufawe.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_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 10372 bytes
SHA-256: e24c2499010931f813b95058908c4f6f33cc535db4e13b57ab86f91e4c432ed0
font_01_sfnt_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 16640 bytes
SHA-256: 1f80eb5b46bc61b1b2bc95ab0866b2624374021ceb86ea540e751ed7d8a24f4d
font_02_sfnt_off000127d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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