Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0eec6d82e3f33bb…

MALICIOUS

PDF

74.7 KB Created: 2021-03-24 14:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cb3fe1ca72c7ef5e6cfd7a63a94fc55d SHA-1: a8773be3c07a165e1dcd7b945ed159a69f0d718a SHA-256: f0eec6d82e3f33bb36319f74543251ac17c087969157c6de4d4c5573970d3eb0
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document may be a lure to obtain credentials or to bypass gateway scanning for a subsequent payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=monster+270+speaker+specs PDF link annotation
    • http://shop-you.xyz/tratamento_da_anemia_megaloblasticakzdl7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_6043f8b8a9712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_6054b84964908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_6059644090700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_5fdc5058d7283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fe57c39cda6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_603cc4468137a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_600ea3bbe5dcd.pdfIn PDF document text
    • http://ag-management.space/free_bible_study_notebook_templatekr122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384639/normal_5fe1bca4702f9.pdfIn PDF document text
    • http://yellownatural.space/7113690585szykn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_c8c390a20d9c4c61ba91fb90b76183b6.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_c1099f8dba1a441cb0d80989e35fdcc4.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_5b8309fc54714857bbf0bb71664317da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guvovigo/numokupomiwipatibi.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_e092b3da4c7d405f945d8765780bd7f0.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_3bd3d7a934f042b8a2e311f52d58269d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/master_1_information_communication_paris_2.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_e983207a73b146b19dd25c34cbb55f4e.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_30ecb7752c2243338e8d0fd98e3442b8.pdf?index=trueIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_e854c2fb17f74accb1c287cbfbfce7f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/migode.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/pixikuzenodefijogen.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 5316 bytes
SHA-256: e3e1fe85db67b9d682ae7b10609521798734261b19465f31fbde8d1aa22d3ee8
font_01_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 11664 bytes
SHA-256: 86fd87fb42fee873e1c3de02ddb7a731351a3b734b375abbea860e303e90500c