Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c060307c9e2fa39…

MALICIOUS

PDF

89.6 KB Created: 2021-03-20 13:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 753c2af407d7cff43869d4c5e3d4ab99 SHA-1: 4c93d8991a9c67f151e914b175e97453b37a0367 SHA-256: 1c060307c9e2fa3921c65d51ecca8ff8dc4bde2e7fb1f0b4596279f8ff7ad5e0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=el+matrimonio+es+un+pacto+de+amor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5ffbd2a31c526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_604f9c8d9bf30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372702/normal_6009a59cbfec3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5fc804ac6421d.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/48386452493.pdfIn PDF document text
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/dozofeda-wuzax.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/mifonijoneriturefenu.pdfIn PDF document text
    • https://xukoxaxap.weebly.com/uploads/1/3/4/7/134748194/6538097.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/40893633653.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/dowomije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_603b7eb9ea207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wizigipixe.atwebpages.com/2591841944.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_c132f86561ee4895905a9681894d3c3d.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_4ce1de03cdc94e6c856029409c9e1149.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_b9eac3cd31044e6abee781e941799e32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/friendship_forever_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/columbus_ms_police_department_reports.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_6dd527850459466a82ccffe07c5d1333.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/dojamuvodunar.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_0fe53f3817a44696b06763834af3af10.pdf?index=trueIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_1613a099be954e74af1274024201ee73.pdf?index=trueIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_b965483b6a48469984da3aea5682f57c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/algebraic_expressions_examples_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/phoenix_os_boot_error_android_x86_64.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 5056 bytes
SHA-256: 0968c8875e24096709da4d70c86d696db3023aacee2c3906844dae11a49162b6
font_01_sfnt_off00012016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12016 12528 bytes
SHA-256: 2b8e2c5c7b0412cfa976662ee8f73db5d5b81c40d1118a69bea5ce99b2ae42da
font_02_sfnt_off000148f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361