Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced20f2208c336f9…

MALICIOUS

PDF

77.1 KB Created: 2021-05-03 04:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6cca082e5284725e586e4cbb384bd94c SHA-1: 59f64f176e32b0ca6cc597ef35b3371553c78298 SHA-256: ced20f2208c336f9ae01f91a9c49a69713ec8b26550013f03acd70c7402f64c0
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 0.9993

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://jumiwimov.ru/strik?utm_term=how+to+put+food+in+air+fryer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5feb8045a1551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_602e4615141a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_5fd38c91428d6.pdfIn PDF document text
    • http://icily.xyz/648936359797cbnb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_600866c703dff.pdfIn PDF document text
    • http://sosed.market/77855932662gge1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_603e3ecc20fd7.pdfIn PDF document text
    • http://verifiedbadges-form.com/tevajeputiguwibofanoroxzsv73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_b07baf7961f94d5499d508818732fa18.pdf?index=trueIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_bf7b29e4aa7f4c05beffb158e42d9d8c.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_b115be352c274b6bb37aad27bfb13a94.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_1371e430444447d5bdad7498edec8966.pdf?index=trueIn PDF document text
    • http://nawamejewiwuja.epizy.com/45641213872.pdfIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_77fc4da37f134830b557ff1a6610fb82.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_04801030ca544dbe8c8cadc49dbb97be.pdf?index=trueIn PDF document text
    • http://gaxopuna.epizy.com/sap_basis_transaction_codes_list.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_e814e7729c954c889dd92f92c374103d.pdf?index=trueIn PDF document text
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_f6dee0b2a0454a11a616fba404d85166.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_9501efdb924c4762abf31fa0ba814492.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_e53194c7960a4b3babaa7ee9976060ab.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_bd725206083b443b88ba272afaa5a6ec.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_a6a67819da4c4d958958a072c0082c8b.pdf?index=trueIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_d3825f7d2cf64e33abc143079fe54098.pdf?index=trueIn 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_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 4980 bytes
SHA-256: dabb368b8fbc2755c304ba245265b01c00a0fbaad0aa57c12107e8e123c1a8d4
font_01_sfnt_off0001010d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 11164 bytes
SHA-256: 6e2f2551459fef48e2f7b2fc34f8d464ea514a028f337ee5731f760014f88215