Malicious PDF — malware analysis report

Static analysis result for SHA-256 398fc5c64a5a5fe4…

MALICIOUS

PDF

129.8 KB Created: 2021-05-09 16:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c552c8cb0c1e66118c2f0ecb77182cc5 SHA-1: 8f65dc2ba8ae809d6b16d11deb38f1c29e9d540a SHA-256: 398fc5c64a5a5fe465efdca176d447fc451126bf7feb6abfea355026ad4e24d1
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 0.9976

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
  • 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://soxebez.ru/strik?utm_term=powerflex+525+jumper+settings PDF link annotation
    • https://cdn.sqhk.co/torujazelome/cieIRgi/movistar_peru_telefono_desde_otro_operador.pdfIn PDF document text
    • https://novatoful.weebly.com/uploads/1/3/0/9/130969934/38d6cdd54.pdfIn PDF document text
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/2175104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5fcbea01e4f06.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/1972032.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/ximares.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/6ihItwO/fulesalabijowuzu.pdfIn PDF document text
    • https://kusazejur.weebly.com/uploads/1/3/1/4/131437880/d92a9c47331ef9.pdfIn PDF document text
    • http://serodot.iblogger.org/pirates_of_the_caribbean_medley_cello_sheet_music.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/6a8e6454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_60642f60539f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_605918de9e294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fd98bfa1ad7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_6043384fd560b.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/worafari.pdfIn PDF document text
    • https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/tavemupob.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_eda15dd5cc4f4c0d924a1d0a603be68b.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_c25c1f15ae184805ac8afcce2f6d2e3c.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_08fbd119a77c450f9298103327da09d9.pdf?index=trueIn PDF document text
    • http://radagofisi.epizy.com/17976864943.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_d2889755abc940e5953d536a04bf320a.pdf?index=trueIn PDF document text
    • http://verejixufitoge.rf.gd/60556469476.pdfIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_763f0b6299eb4c0a8eeb0f4b718ef3b8.pdf?index=trueIn PDF document text
    • http://gegawuwiru.epizy.com/potentialities_agamben.pdfIn PDF document text
    • http://domirewuzi.epizy.com/62206899409.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_off0001b3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3FB 1708 bytes
SHA-256: eb0b87445f4647f30bf4435cbd7ece65da4ef4a1221230cdbe76e127c6b85938
font_01_sfnt_off0001bc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC61 5504 bytes
SHA-256: 301abf5ac2a9782eb66231e2e969dbfb2139d3586f2d0cc0826296bc6217eb4e
font_02_sfnt_off0001cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF2F 12400 bytes
SHA-256: b391425908aa5ed4be25a40a3dbdf7863ce7efb2072668e67f8298e1da3d2624