Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6f587f8b79ebc0…

MALICIOUS

PDF

122.8 KB Created: 2021-03-14 04:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d33124007df4bc50a07c9df310d2e35e SHA-1: 55b98ce948202d815fb142d6f3fedebbbe29bac4 SHA-256: de6f587f8b79ebc0eb63aa586b8c8ae3a95f77372e8c6fbfdfda02509a763a9d
186 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 file functions as a link farm, containing numerous external URLs, with a primary malicious URL identified as https://mezovuduw.ru/award?keyword=defensa+nacional+pdf+peru. The presence of many links suggests an attempt to manipulate search engine results or distribute malicious content, aligning with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://mezovuduw.ru/award?keyword=defensa+nacional+pdf+peru PDF link annotation
    • https://cdn.sqhk.co/mujawiru/hgccQN3/bunudumatusowamojemam.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/chggjtD/selidivezawejafotutozu.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/99300312630.pdfIn PDF document text
    • http://gisujug.mypressonline.com/26931948287.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/9Fr6Kja/47308731288.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/17092999286.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/ih1hijj/fidezudufibigasexelujin.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/3Yif13r/who_wins_cash_days_on_street_outlaws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c584cac1-88a7-499e-b8eb-cc0e477d9bf3/52254907680.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_e4239f17e90e486295a358c19b559418.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/building_foundation_design.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_bd62db2ec9e9451ebe2d8ccaa29d6fac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafirawit/63242393966.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/la_plaza_del_diamante_serie_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9b2923-582d-4bc6-9638-cf76e92d6b2a/verifone_ruby_2_commander.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8145c2c-0737-4d09-97ce-fd8375e7b84d/skeleton_crew_stephen_king_barnes_and_noble.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/zopokebijodiwiku.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/38070087901.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/logo_quiz_answers_level_4_iphone.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_d18ad03b344e436795060e27a02ee7a7.pdf?index=trueIn PDF document text
    • http://boxijekew.atwebpages.com/582928448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d36b76c-7102-48c4-a81d-b7c887f970f5/wanukadizedabub.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_782b80e6945d4715aa2acdfbed587bd6.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_eb486737dfde4f3c98ffeb34df4832c7.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_885848065f4a42638c0c6f31fb5245c5.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_4144d70928624d8990356b5055bbd784.pdf?index=trueIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_b54c3d25d5ba411dab9f96613e73a0ca.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_a8b3f9f8564540369591c8a861ad5f39.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C34 5148 bytes
SHA-256: 427038ca9dff52378927958fb1983a4220a29addd25080f2ddab0bf5f491530b
font_01_sfnt_off00019dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD4 12348 bytes
SHA-256: d0cbee210b65e0d37797cf952f5c9d602bea9e1186341e22c0f82246a7964815
font_02_sfnt_off0001c56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C56A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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