Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ba764c6bb3d3c4…

MALICIOUS

PDF

84.0 KB Created: 2021-03-30 01:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2afc671b79267e9269c127c666a703a SHA-1: e3647e15b859a535def7f3d7b600f17e1a700338 SHA-256: 58ba764c6bb3d3c4055c5db8df68c18a5000809a6bc6d4c1e97e83dc663fd016
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a large number of external links, many of which point to other PDF files hosted on various platforms. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links designed to appear as search results, likely to direct users to malicious content or phishing sites. The embedded JavaScript and the numerous external URLs suggest an attempt to download further payloads or redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kuzutuzo.ru/award?keyword=the+black+cat+edgar+allan+poe+pdf
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ff22a9a9cc6e.pdf
    • https://tusaluzope.weebly.com/uploads/1/3/4/3/134374665/61d7e556e579f.pdf
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fcfb57f4687a.pdf
    • https://pubotaxo.weebly.com/uploads/1/3/5/9/135962756/20052ede173.pdf
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/65ef3034f37b.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/pajakazukep_takojudur_mopofenabizud_vozexe.pdf
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/5695891.pdf
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/sowaxoximuji.pdf
    • https://static.s123-cdn-static.com/uploads/4482636/normal_6001dada37bac.pdf
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/5304168.pdf
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60350b5ac47a2.pdf
    • https://jamibada.weebly.com/uploads/1/3/1/1/131164428/ba04a0194.pdf
    • https://cdn-cms.f-static.net/uploads/4421776/normal_6036a540b5821.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_27c65740f0134984857d1c778d47c767.pdf?index=true
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_43dd1fba70bb444788c82536b42a96d0.pdf?index=true
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_988323ce5f544b748234325fda93c1b6.pdf?index=true
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_f6dc3b96a43d4c4d9c89b9d6b358be08.pdf?index=true
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3027a634172843b6ae65ce8f688ab4de.pdf?index=true
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_cfd0aacc63184b66aff85457e9284d68.pdf?index=true
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_34cb9f16df1a43e698e4de6e2db1443c.pdf?index=true
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_2752c71966c44e3e933198574fea0db7.pdf?index=true
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_b633908922bb4ef988164c24d4a9e20c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe84.bin
05b1114c8e5ba9faf93d3558fba7c279c036c16e1b8b45537001fb9ffb392ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 5132 bytes
font_01_sfnt_off00010fed.bin
a2e1bc9e6892f1b85d42afcb764f15e5eb057188d45adaa321ede766b4b67769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 11280 bytes
font_02_sfnt_off000135ad.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135AD 4324 bytes

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