Malicious PDF — malware analysis report

Static analysis result for SHA-256 978323192e872fa0…

MALICIOUS

PDF

94.9 KB Created: 2021-03-08 20:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d264b42f98c84a4c7de10a9e079f576d SHA-1: 77d98e40fb828f0fd5649e3e868c4babe0af5503 SHA-256: 978323192e872fa0b425c98d6a0849946d985758255197ea9093a05aa8975994
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=a+la+claire+fontaine+sheet+music
    • https://static.s123-cdn-static.com/uploads/4375700/normal_6008213e04fc3.pdf
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fcc100872e35.pdf
    • https://static.s123-cdn-static.com/uploads/4379219/normal_5ff1c9d26d509.pdf
    • https://zisamezasebav.weebly.com/uploads/1/3/3/9/133997726/7875145.pdf
    • https://static.s123-cdn-static.com/uploads/4377909/normal_5ffe9417ba21c.pdf
    • https://rijejoxutozi.weebly.com/uploads/1/3/4/5/134599637/37adba08ecc6.pdf
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/zugumejofe_sutanuzup_nisuwozijaxas_lujikodor.pdf
    • https://cdn-cms.f-static.net/uploads/4373281/normal_602bb8e3ea863.pdf
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/a5d6388d0.pdf
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/6193409.pdf
    • https://cdn-cms.f-static.net/uploads/4485322/normal_601c6a1139b3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_f5a1b10ca79d4582925ad0d755d3fcfd.pdf?index=true
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_21d9ce32c9e64164ad89ab2b1d713af1.pdf?index=true
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_217eb697b3b54f6eb71c7ffef97dc1de.pdf?index=true
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_5312dd7083fa4a3da24f73f39490ca37.pdf?index=true
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_1ad379366ece4e0180e326af1bc4dc05.pdf?index=true
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_3cf75db96ec74716af7bd783bfcd7dcf.pdf?index=true
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_b9e240461f8245aea57a36027e680647.pdf?index=true
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_263ad636bc874bfcb84424cd95537782.pdf?index=true
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_eae43682f6cf4ef6a686f9c3b51b9f58.pdf?index=true
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_0413c7107f7045b6bb079184a5afb383.pdf?index=true
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_b67b8f5db55543ad860e3d353f1ed783.pdf?index=true
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_934840d5638e493ab5bebff07cd921e9.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ae.bin
76dfa96263155a03c482706136aba0cc67e3be70c6839e9999968cc5c249be50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 4992 bytes
font_01_sfnt_off0001136f.bin
e05f158b0334b98530a631d115a98106e640982ea926a495b8e7ff59d0bf337d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 16864 bytes
font_02_sfnt_off00014867.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14867 16204 bytes
font_03_sfnt_off00015d95.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D95 4324 bytes

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