Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eea393b098633e…

MALICIOUS

PDF

78.6 KB Created: 2021-04-04 16:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 354a1391e165ab0b8591b631ef9b4bf4 SHA-1: e8e7c6990256532d737e78877b635a3345e90e33 SHA-256: 19eea393b098633e97d497e4526bd1948b466143ed1535a4b415bc3d9c17a780
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO spam or phishing campaigns to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=how+to+reset+casio+aq-s810w PDF link annotation
    • http://rupuvuk.22web.org/26747420757.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/7e6bddf1-10fa-4e98-9066-1e01bdbc8337/berserk_manga_new_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/xosadu.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/mukoniragalubafuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a866c6-5776-47cd-9276-5e564f846ceb/xivexolefisaro.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/xumanuvukabowiwitatuzab.pdfIn PDF document text
    • http://sisofejijo.epizy.com/killing_floor_2_multiplayer_gameplay.pdfIn PDF document text
    • http://nakirere.rf.gd/treatment_of_amoebic_liver_abscess.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_987b1d7d03064135baa4f159cafbda22.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_cbbb0a59794a4956891c719892e0328a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezux/58173182989.pdfIn PDF document text
    • http://bokapakubab.epizy.com/10908219944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44786e7-0f2f-4fe2-b3a6-0953db241648/health_and_safety_engineer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/why_shouldnt_we_abolish_the_death_penalty.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_8b3e52f388f34556bce57fb980ce8080.pdf?index=trueIn PDF document text
    • http://pazipinabobon.epizy.com/79929089700.pdfIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_238b645ef06c432d901b96375b1acff6.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_603a8065e3604aa288258d271d4ebace.pdf?index=trueIn PDF document text
    • http://vilewol.epizy.com/vocabulary_exercises_for_advanced_students.pdfIn PDF document text
    • http://bavosezema.epizy.com/11715480130.pdfIn PDF document text
    • http://zomekijisev.rf.gd/classical_guitar_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd258bf4-f495-4242-b3e1-08e739944eb6/minn_kota_power_drive_v1_foot_pedal_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/ardmore_shipping_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/27174555153.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5360 bytes
SHA-256: 388ee4ec44070dc8c58bf0449d5ac206ddef1773e4396811da37aae6c3fa81d6
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 23156 bytes
SHA-256: 4c7ee537928ce093bdae53fa0229715b98d825e762dc9bbba08da9e2143fcd0e

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