Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedb750e4724f3c3…

MALICIOUS

PDF

72.5 KB Created: 2021-08-30 19:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 79eede49049a8605f2ee35ba52e5c337 SHA-1: 51bce8c80a5eae51922a39e25ab24ec8a4378155 SHA-256: eedb750e4724f3c362d7883b4d015cd2fc7074ad0b6c2aa9e49baddb42961df4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=car+sales+agreement+form PDF link annotation
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610a8d0a01a66---53895143220.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/83eeb9f9ddba27746324eea26ef046c1/17786530441.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/jejirulogotupokoru.pdfIn PDF document text
    • http://computerdoki.hu/user/file/fidixiwidowejoginujadelek.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/63469486627.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/fotipidefan.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210811043451314.pdfIn PDF document text
    • http://deryalvincotokurtarma.com/userfiles/file/zewivuzifelopamafukosexo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69c8c865c9---91764104150.pdfIn PDF document text
    • http://faradbox.pl/files/file/85915553092.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c943d77f9a6---fopalisaxar.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/gilikiwijerixi.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add7aac49d6---11310433977.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/m1rjkijkfb8ecld957erpvk5ff/92414651584.pdfIn PDF document text
    • http://jcpingie.be/public/files/44714005242.pdfIn PDF document text
    • http://tano-cable.com/d/files/62516463988.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///76528598133.pdfIn PDF document text
    • https://wagaskar.com/media/xokewatewemuguwisaboliv.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fad02afac131e0e9ee4fb1bd53763bfb/85490491181.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/zororulegurelogusokuganeb.pdfIn PDF document text
    • http://mfcpavpos.ru/file/35844762865.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/niverilifetakab.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/97263197307.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/66039425114.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c154d34e5a5---87863451172.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_off0000bc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5C 15648 bytes
SHA-256: a484ccc527ab1b61b497376dde2555226674b766b2e21a35cecc5cc3cf8a5249
font_01_sfnt_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 10496 bytes
SHA-256: 6c44a18df09af99dfe9b7c8e217b3f351fc50cb346937b855329c3da9980f3e3
font_02_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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