Malicious PDF — malware analysis report

Static analysis result for SHA-256 7294e61f77e5d42f…

MALICIOUS

PDF

90.8 KB Created: 2021-07-18 17:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6095de99c0cfee6b8714dd4512eec4ef SHA-1: a0d0d26f764e77efbcff3cc668b062699343517d SHA-256: 7294e61f77e5d42f65f2c20ead7504ebda93110c47e4c95de88c2bdf005ab637
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/989d7e111d68d22faa976ba8f319ba21/lutuk.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8745e61531041286ed745c3a9debe222/61440000612.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/38n74rk37pamfffqukt6t62vg7/minazi.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/94157085824.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/pevekifotisadogabakosanuw.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ca2ahcn9hmv5ibj368cj7ae5f0/nigobadineposisaxem.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/5073457932.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/ef5fab74791d5adea9e428e4c445f065/25943064264.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aaffbbe9686---kemeledowividap.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/tonifubaxusomodomojedelos.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/66123227597.pdfIn PDF document text
    • http://jarosi.hu/files/file/39862777171.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/badisu.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/mutawuxupuzovixi.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/fanekem.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a40d6b4b1f6---52888693461.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/93924505273.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/tatotok.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0de6bbafdb---43800726045.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zuxusivijirig.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607984eb9187d---87315293430.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/bixofezudawinijole.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/7f13c518167ee7f9682559c46add4f84/98302992944.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/661e4e0cdea0045ae88464be8cdfa6eb/53658408926.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074a3e1c32de---49605995631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+holy+road+movie+release+datePDF 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_off00010081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 17212 bytes
SHA-256: 2de4ed6eb51fb0ced777ad0b63b6aa94fd225815e8e2aaf345439528c5591236
font_01_sfnt_off00012d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9E 10552 bytes
SHA-256: 014b552076275cbdca1b03691a40595b8ecf81b49c8177221fac5401cb7cb508
font_02_sfnt_off000145bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1