Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d12ce6d97c088b…

MALICIOUS

PDF

78.4 KB Created: 2021-09-19 01:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9f3bc6352b3bf486abdaff03d228320d SHA-1: ef5200f2206741870ac37012e84458deec9c2c9a SHA-256: 27d12ce6d97c088b1dffa0c0f537b95bb18af43d04a48b9342a293bea4095b95
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated, but the presence of numerous URLs pointing to compromised CMS uploads and disposable hosting suggests a redirection scheme to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://drisraadentalcenter.com/userfiles/file/46481856774.pdf In PDF document text
    • https://jamisonfurnace.ca/userfiles/files/siweso.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/3f3015075cf7aab946414a2c7e8a720c/domepaxilofati.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/g2nu7sdmcaspaf8vljs5g5srv6/dedididiroka.pdfIn PDF document text
    • https://subded.org/userfiles/file/forijolofot.pdfIn PDF document text
    • http://okvin.org/userfiles/file/wowop.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091712471873499.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/susikil.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/79717979678.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/tomalagefamejel.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/38048583220.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/ralovewozuf.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/7490840672.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/12969151048.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/28035182588.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/7855099404.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145761004b2b---53435239803.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/1f4ce5b6cf94aa7ed39fd75457122dfa/lovetuwafudumone.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/bekafopale.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/jeserebonu.pdfIn PDF document text
    • https://nexapos.com/upload/files/wivexufararizowan.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16133f33929b34---zajokifubewawalebuwote.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/92042017772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+view+html+file+on+androidPDF 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_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 18276 bytes
SHA-256: 3a1ff89c0abb7529a6bc401b9f3b96a224b5438e06adef2b48b1207dd6dd52ce
font_01_sfnt_off0000fc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 10592 bytes
SHA-256: e51fb64d1e24a1b9638aaf62986334559e44c8bc67daf9d4eb95323d46f97dec

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