Malicious PDF — malware analysis report

Static analysis result for SHA-256 78312bc1c51dda86…

MALICIOUS

PDF

127.6 KB Created: 2021-04-26 07:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dc4bd4a9780552f2deec76ca60941977 SHA-1: 961324ecae9941b3fce0bd1a1a63de3620f750d3 SHA-256: 78312bc1c51dda866aedc809148b8e34edd48fb29a79fbeabe5a5284e8418235
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs, with the primary suspicious URL being 'https://gimoguvi.ru/strik?utm_term=rosemount+3144p+drawing', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=rosemount+3144p+drawing PDF link annotation
    • http://topcreditscore.info/376360524434woye.pdfIn PDF document text
    • http://edarudost.online/39567345826yarts.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/nubomazobad.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/clases_de_fuego.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/munchkin_weighted_straw_replacement_amazon.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/broadcast_news_production.pdfIn PDF document text
    • http://cmb-societe.com/dunaxn6a42.pdfIn PDF document text
    • http://trokot-shtorki.online/brene_brown_netflix_special_lengthien4a.pdfIn PDF document text
    • http://teren.fun/41759380835blxky.pdfIn PDF document text
    • http://anrostore.ru/what_is_the_pluralism_theorygekef.pdfIn PDF document text
    • http://winoorama.fun/19940479676c68do.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/3218710870.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/secondary_polycythemia_phlebotomy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/how_to_port_to_vodafone_online.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_e68ef7f48c524856ad096e2fff930153.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba342543-79ca-4285-af73-ded398be28af/home_speakeasy_bar_ideas.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_037c4b38b4674c6b94a00851e49fa8f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/spss_survival_manual_7th_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e1bcfb-aef6-4933-8da4-6d4a999cca61/85567894424.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_bda95b3283484080ba4c0a04a05d30f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/20de003b-ecde-4db7-9247-8ccbcd2b7b29/59030592511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939824b3-d68c-450e-bf9c-4200e7a1d7b6/devadokenifaxibewuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16601 14868 bytes
SHA-256: 3f4e94798a07d53632792a9f1e7a668785c6efba8da29cdbf715f8e179752d46
font_01_sfnt_off00019378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19378 2332 bytes
SHA-256: c3e015b20c482633454922459fbe288224baf81814fec4640790c0917cf250cd
font_02_sfnt_off00019de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE9 5648 bytes
SHA-256: 3236bff3dd659ff359205d25c2e3a2135118af868a940c4e65c86673de99b3a2
font_03_sfnt_off0001b12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B12B 12480 bytes
SHA-256: 829a2b3cfa4636ebc995d003e07861a057c3cc2ea305bb5d9511940faa234c76
font_04_sfnt_off0001dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBCE 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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