Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cebf0aa894c5a0e…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 19:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07dd6e63fb5874126beec1eff92919ec SHA-1: 2e1a23a09b6ed41b93741732aea97b47a8550260 SHA-256: 2cebf0aa894c5a0e7afcbf11b038cfec6d23215b084bbe7e32c4ade91111588d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, including one to 'xezojetit.ru' disguised as a search result for 'Android tv box best app for movies'. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm or redirection scheme. ClamAV and ML classifiers identify this as a phishing or malicious PDF, likely exploiting a vulnerability to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=android+tv+box+best+app+for+movies
    • https://cdn.sqhk.co/pabelemusib/bZvvggf/superhero_mod_apk_naxeex_llc.pdf
    • https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/wobizetixifeduleze.pdf
    • http://vknart.xyz/football_manager_ultra_2018xfmk5.pdf
    • https://cdn.sqhk.co/mosepoxik/heldjgp/xirakebajedokovuti.pdf
    • https://dijozigi.weebly.com/uploads/1/3/4/7/134748041/wafikuzufemupa.pdf
    • https://cdn.sqhk.co/vefuwebilux/hdjcrij/natural_color_toe_nail_polish.pdf
    • http://levantegroup.net/calculus_for_business_and_economicsf1mir.pdf
    • http://all-system7.work/69321353388rb3un.pdf
    • https://metojonokodoto.weebly.com/uploads/1/3/4/8/134881876/pigevutaduvir-jamabanatos-mekoborevore.pdf
    • http://filfex.ru/scope_of_adventure_tourismmokft.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kexamoxusinixu/crt_exam_questions_and_answers.pdf
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_55ba5d4f9adf4a26bdfb211e15e79ece.pdf?index=true
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_5727c4912d694373b427f147ad4b010a.pdf?index=true
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_f3aec50ed41d468ba3308cd0c5f88e6c.pdf?index=true
    • https://s3.amazonaws.com/tobovunoberiki/naca_airfoil_nomenclature.pdf
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_f7fe3899122144fcb54b4c15b91e7cc7.pdf?index=true
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_0737dcd3f9f74394985e7afd1c46d153.pdf?index=true
    • https://s3.amazonaws.com/jobavo/the_amazing_spider-man_the_ultimate_newspaper_comics_collection_volume_2.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_52ca143afb034285907725ad8d701f00.pdf?index=true
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_c8b49c94c036417badc1a2197103d1fd.pdf?index=true
    • https://s3.amazonaws.com/dudigonifu/el_bullying_o_acoso_escolar.pdf
    • https://s3.amazonaws.com/vifusupegiza/eragon_book_series_summary.pdf
    • https://c2245d91-bd3f-4016-bed3-1da34bcfd793.filesusr.com/ugd/9a652e_72dd194298e7495eb0cd07d33cae84dc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2f.bin
01c147d3330baf134f595b986ecd33577dc323f1a4deb35cca5b1293335a0e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 5412 bytes
font_01_sfnt_off00010e88.bin
0b6492eea66550173d5259b6a40418b98b303dd59b58c5cfdee7f9456cfe9bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 10872 bytes

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