Malicious PDF — malware analysis report

Static analysis result for SHA-256 056d900d7aa076c9…

MALICIOUS

PDF

75.2 KB Created: 2021-07-27 23:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ad3183ac7fe4ab590752b987cedbda31 SHA-1: 0dda0f103567417381a938dacc86af76e593a2f1 SHA-256: 056d900d7aa076c9a46fb35d78a45aa4a83faebaad6712fe486008fd6832c28b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external PDFs hosted on various domains, many of which appear to be compromised or disposable. The PDF structure itself is indicative of a link farm designed to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://foto-klub.dk/userfiles/file/34356505022.pdf In PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/baxofaluxirerinan.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9569bd669---56781114433.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/46d2fb71aa47fa02cd8707ad4a343a2d/zibipatedofebag.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/15636377281.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/gibevubolepizum.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cg6o6g7cu7vsd5lsth89f97eds/3294463691.pdfIn PDF document text
    • http://dzbnf.com/upload/file///tafowutewimijizul.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/93794978801.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb2b3c6e1---gesativuxusodal.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/858ea708990ec21ade9305f2c07855aa/kexisevidufanas.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8279312b---togoritese.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/864c0d202f273330f4ca27088dfbae4c/45004896798.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/91810470469.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908e0daf2cd---dodos.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8663829f2---36953337240.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/819e5e1718c5749fff6f9e8ec6bbecd6/ligalopeserawixovitoxol.pdfIn PDF document text
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/ee9057ee4f8684d717a7920da9093fb6/27116796269.pdfIn PDF document text
    • http://iwishop.hu/file/sikajetinadowutep.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882069d1f8---39798083363.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/47485059489.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/midutemimadexipopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ohm%27s+law+practice+problems+worksheet+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_off0000c2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D2 15952 bytes
SHA-256: 36d94c9e3c5c580dad35f10dd8cf78e70eb316c235318deba3c84888b5e2c73a
font_01_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 11156 bytes
SHA-256: c2503295c5ee818d164a9f4008259789d2c5e4bf01ab6e72e643a98181f010f2
font_02_sfnt_off000105e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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