Malicious PDF — malware analysis report

Static analysis result for SHA-256 865cc25cc1d644a0…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 11:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c0fd6592ccfdc4420b9023919f9192f3 SHA-1: cd61d0befe8cf93ef26872249549cfdeb020f00a SHA-256: 865cc25cc1d644a0afc56a5d9bc16d7ad9c0a527abc892670fec6bfd182a8af7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous external URLs, suggesting an attempt to direct users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://ponafet.ru/wix?keyword=bet+uncut+logo PDF link annotation
    • https://surigogalabilix.weebly.com/uploads/1/3/5/9/135961506/noduwitaziwum_fiduwi_wokil_danenix.pdfIn PDF document text
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/mazuvax_xizawi_vakopi.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/fifesorumul.pdfIn PDF document text
    • https://vaxulazazoju.weebly.com/uploads/1/3/4/5/134587837/viguju.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/nomidesozofa_vavije_gewebexek_wubeworepu.pdfIn PDF document text
    • https://marevesebogu.weebly.com/uploads/1/3/0/8/130813877/titazojosutikuf_gunujiremep_letujowonabopif_sakinozid.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/doro_mobile_phone_for_elderly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb5a1bef-7d05-4463-9361-9dceb4a497f4.filesusr.com/ugd/b13fd1_251241a9d73646c89da6c27840702d4f.pdf?index=trueIn PDF document text
    • https://486a928f-df87-4682-b39c-9199637d78f9.filesusr.com/ugd/982a49_466c5b1ff38b41ba81a9992c6b331307.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/70945669918.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_04309abc6a3a4e6887601b2ea8291ea4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/expanded_polystyrene_sheet_density.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/83245664020.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/toro_power_clear_518_ze_carburetor_adjustment.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/kivadof.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_fe98497fab8e4004b7a89ff83cffbd03.pdf?index=trueIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_ee5ab878f3b94b9485f063bea5bffaf4.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_8c5c50dfa3954efea29986667f986388.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/word_problems_dividing_decimals_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/anime_batch_baki_2018_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/fofipenukaku.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/antariksham_songs_naa_songs.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_0b99b0cb0d964a34940a8adb95928795.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befarekogol/what_foods_cook_best_in_an_air_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/83624970806.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_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 4532 bytes
SHA-256: 3572ff5028e199d63e28d61d929b36d868db50d040ad69a3a18eb8a64b3b1c32
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 12240 bytes
SHA-256: 356879d2ad83038b7f2995b4bea8861e91b147f40b0167383e746d5779606c25

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