Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46c903def84df9f…

MALICIOUS

PDF

86.2 KB Created: 2021-09-15 18:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89b84d8f5a4447576638f0e9e18ffc6d SHA-1: ff6e9da5ed552dfb08f2d1bef0a85324ea42e86a SHA-256: e46c903def84df9fece7eb3334c52c5e6aaf9b2d55a8e1a1d115eea8ab997156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buwipu.pdf In PDF document text
    • https://motodubai.com/uploaded_images/files/wojot.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/81678382787.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/71499899692.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3d5f4ec041919e0c3c9a60a5e005a0cd/tezikujatevarulumupomeno.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/ribugalir.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140901fd0569---tiwavulum.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/25747595576.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/sogorovubakijobowenegafi.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/58735317932.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613305265c2eb---norepir.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/1044962490.pdfIn PDF document text
    • http://baove247.org/upload/files/zesinitu.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/31826017680.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/79847986209.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/70824845398.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef71ec417b---sojevovetilututovijolaxas.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/gumibaviwojoxokefobaxav.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/24075280546.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/67635696378.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/bedejemonokebiwulaz.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/50902250425.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/58760233427.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/47134083485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=xender+app+download+2021PDF 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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 18088 bytes
SHA-256: b7dedf9616f1cb32da16947502c8f6b62d237e7b3306ea6b34d734b7d5822813
font_03_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 10412 bytes
SHA-256: c91c346de30adc429e3dc29f8c90d5049ac2ba7ed3ff77c6486c6186b431e4fd

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