Malicious PDF — malware analysis report

Static analysis result for SHA-256 8027dea28a0f6cfe…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 01:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 99670d7fb09fe5c46c5c1da3d4638894 SHA-1: 69e8944fa69993adcc5516b06524ab80c0db7b2a SHA-256: 8027dea28a0f6cfe6a6d9dd4e1b207d67c874c5b9464d7846d4d0c16eaf37a38
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing pages or exploit kits. The presence of multiple external URIs and link farm heuristics confirms this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://studiomarazzi.eu/userfiles/files/ziwasofaxukudevosiwurinab.pdf In PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/46479b17c7153f23e5ed576b92eecfcd/wiviva.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ceb3935c75---34334402807.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/38162800703.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ne9b6s624srt77merfdv717r5t/77778216937.pdfIn PDF document text
    • http://llux.vn/uploads/files/3689523965.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/95712887854.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/furimozonowakugesikuzit.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/518eddb281516d0e94c5ab265beca88f/sibatobujisuxofugomabuz.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/868b351a3a0146b0ddab3791e80ce100/62804738307.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/c74211b40648b514b3436c293f8529b0/82608550196.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/gowosasatokab.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8960ac678---24445277767.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/53c78235fa6df9f58a339c6764f5813d/32868705439.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/nonobo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc43b4ce93---2225516784.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6e88cdf6---43414399025.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/161a3c53f03d2da20d17c28e2cb371f4/58071094236.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/59f00c9143804bdc7e82a7f837667f04/xejidowudepopemumovene.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210620183750.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=communication+engineering+objective+type+questions+and+answers+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC1 11732 bytes
SHA-256: db95130d6a8af0a0d47cd3df1e0362e1ce3f0d426dbd63aa0d7030bca3c11380
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 18960 bytes
SHA-256: b352966447cbc6e41e06d0d751450ea8d5268387974e7992cb0726cb088048de
font_02_sfnt_off00011c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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