Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb46972af49dfb29…

MALICIOUS

PDF

83.2 KB Created: 2021-04-01 19:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d8767a55a37b18a80376ad870c89f654 SHA-1: cf0c614bcf4ae03be05058a156edf3064385f109 SHA-256: eb46972af49dfb2986ab84dcc2b8bf8dc3414a5ebb0af9dd61c075004dabbb05
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous external URLs. One of these URLs, https://dugedepap.ru/strik, is flagged as suspicious and likely leads to a phishing or malware distribution site. No scripts were extracted, but the presence of embedded URLs and the link farm structure suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=sappho+quote+franny+and+zooey PDF link annotation
    • http://aov.one/vilurupesibowutebuvxvpz.pdfIn PDF document text
    • http://yoga-fitness.space/33219642290utdv9.pdfIn PDF document text
    • http://item-get.top/how_old_are_the_characters_in_charlie_and_the_chocolate_factory_nowc5kh0.pdfIn PDF document text
    • http://lasleymarkt.ru/8726025780a516h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_62c0e66d4ff146abb00ec1236d6623e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/english_grammar_aptitude_test_with_answers.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_373395a955b041ab9e4d54c8ee52c8c3.pdf?index=trueIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_ac283851c83d476b86eced31c42b41fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/jawibufu.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_677d27e0dd6c4c85a68d5cbeadc960ee.pdf?index=trueIn PDF document text
    • https://eb7ae0bc-69c2-4833-8adb-ed465737bb77.filesusr.com/ugd/23493e_43151e27aa8f48db8ddd5d129cc84e13.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_1433eabde8eb4a84b35681038b9c7a0b.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_700a7106335b4ffea6fce61608abdefd.pdf?index=trueIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_be943566ea5047308577eff308c1b8b5.pdf?index=trueIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_d2a5d4bf22cf4b55b71c5e83b96167eb.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_2f92cade6696472489f57c3e883e11a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/dometic_ac_control_board_location.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_9a6aa4ff44f14dc999fbf0ede12dc83f.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_a903f33c12c842eab3ca36681b6fe62c.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_d00bd92a523f43aa8955a593ccb9fbea.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_4e212ef0659341a9b97195626c34bf8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/melhores_livros_para_jovens_de_romance.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_0645b2cbff3b4fa2baf3c3f5d4c3e5ba.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_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 5300 bytes
SHA-256: 204c1bbea4c35a5a39271a3ae5ad330c5db351793e4df882a368ac607fb839c6
font_01_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 11408 bytes
SHA-256: 75d9917e2d67e6d432c03807cd4ce94107f6511b474f9957d877638850c97ea4

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