Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea16997b47589862…

MALICIOUS

PDF

102.8 KB Created: 2021-09-05 22:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a8026067bf76d3c52f65670c159cfd2 SHA-1: 7108b9ee0800eeb8e91ff14f69bc1b7b3e444bea SHA-256: ea16997b4758986204d13e019e9ba9da503cb830eedb86e489603a74af19442d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to various domains, some of which are compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common social engineering tactic for phishing or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ashokarefrigeration.com/userfiles/file/28520565869.pdf In PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/eb7d228b91ecfb148179e168b67077b0/54431988547.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/46745064130.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b767c557fc7---dusememajerevefutesav.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9946u2oqcle93af8r0tsu1gnl2/54830386436.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/99839279778.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/69225935420.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/taligadevutanim.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a253ce699b8---99673585436.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/29183279504.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a19da172a---pepujiwer.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/25482556028.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/ratatewujowisa.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e6d275d41---mefutale.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab7061aa7---kowuwasesubivo.pdfIn PDF document text
    • http://crm333.com/documentos/file/43107675949.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6b92ae118232e820a3b99ac33e096e4a/mokedo.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/31fadd9cc4788e6b6881214c426813a0/48137787402.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/66465532907.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160af8f7b61b91---volonujekozadoris.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/16709217522.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/53951342577.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f8f7d628---5000152604.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/ba2239a702955007eb5f908a32d3b685/fezigu.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/vevupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=erich+fromm+budismo+zen+y+psicoanalisis+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_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 11184 bytes
SHA-256: 153b7c5a9159d8beb0f3f79fc9a4a640c37afaae3560c319915ead54e5890efe
font_01_sfnt_off0001413c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001594e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594E 20060 bytes
SHA-256: 505613aa6348fdb154b32967eae1dc189ed47c4fb4caaa17cd606c6abf479207