Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee52b19b68509d5c…

MALICIOUS

PDF

77.0 KB Created: 2021-09-05 15:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d35e6c710574a5537ce926afff52a26e SHA-1: 444681d4f7e6385efee4ec445fed3661fe912514 SHA-256: ee52b19b68509d5ccaba8164511685356c47508f083bfe6737ca679005d15699
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the presence of multiple compromised URLs strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/bbfbdd607b60356755a560ca9f467b64/tudisipewopajewegabosonan.pdf In PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/28781020972.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/r2f2ka1dbc4ciibnca8j736ruh/goxamebefanuwaset.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/1b17fbc1f41c66bb00678f97399d5c54/mesekugiwaxoxerazula.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/0kb26kdrq6t7du58jl8kgojrp3/razisej.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/xegokelenekunofomegefo.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/24961309299.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab7bdc108---fewipurobemenozawojev.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-29/20210629081052217108.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a4233135a98---donemiripuxorawa.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/27835232656.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/memaku.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/4klvn2k3b7md6fnvfilhb3vtc9/pomivirijaja.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/9029827328.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/80773659072.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/79965279661.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/11733812838.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/c6v7tfpml72a136nnq682pr557/femijeseluzo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c86459a4ce9---77052016420.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/24878334128.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/84965603488.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/5496336533.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610082f18a2b6---83768465502.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/902351664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=manual+strapping+tool+malaysiaPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/481ecb55ae09966c377c2e2f296e1d51/48353853677.pdfIn PDF document text
    • 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_off0000c92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92F 17536 bytes
SHA-256: 707d5b3410ff4b35e120288fba18b3aee4acdb56aca1fba70868cc3d1db40b62
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 10672 bytes
SHA-256: 2ad99194616dfc44f750b95ab168f0799acdf083aa92c800fd1dbe3a0dc3c7a2