Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01e14fbb35940d9…

MALICIOUS

PDF

98.8 KB Created: 2021-08-11 02:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5f4f5e0a20cfd5628a79bd2c684238f1 SHA-1: 2bbcd980a82eedd1653a630fb955d4e33d00aa61 SHA-256: a01e14fbb35940d928fc59a2988413e8ec6fc143e7c79044fbcdadbc2c242fd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This structure suggests a link farm designed to distribute malicious content, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URLs further supports this. No scripts were extracted, but the overall pattern is indicative of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff3337e309---nosewotuxekizadi.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/f95ec3e3e2752a791c0193bd3c6d5a99/97369535417.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/3da6f52400980711baa0fa57783fcfa2/vomurakususudeliselulaken.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/senon2af6j0g49ugl6ubf40522/wagokuwez.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbeb87f6db---83349980126.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/26938264017.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b383035c5---fagidevitoxusufunug.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a163458f51---77276324217.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/degejikiwojiv.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/4083334596.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c488812769---8605725857.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/debixezaxekemixegadipiz.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/18030312231.pdfIn PDF document text
    • http://change4best.ru/upload/file/togifajodofuf.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/zidasare.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4f2cb3602---35903159874.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce5e5145e6---bososab.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/figavaf.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/73018912915.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/datotumesegekiv.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xobarikine.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/wenesoz.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c27c3b3fa9b19dd0b39ed3a6c7d1352b/18817003918.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/mosamixedoforekulufegumab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=descargar+pokemon+negro+2+para+pc+desmunePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 3188 bytes
SHA-256: 97b66298a99ea52b0b97ba794553de800e76eb460963c2b81f39dc3b1652d717
font_02_sfnt_off00012fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDF 19176 bytes
SHA-256: 25fd7e77fa39b0f2727ac8be31339ecf02a1628e2b984274387b6fa4d3b7a4fa
font_03_sfnt_off00016137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16137 10932 bytes
SHA-256: 109ec780ca6567e78320bd315018260ae7aa9228d80e11f74d11fcb6860885af

Open this report in the interactive analyzer, or submit your own file for analysis.