Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8746f896cf4b39a…

MALICIOUS

PDF

119.5 KB Created: 2021-04-28 14:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: afbcdb5e8a730bf02d98522b003558ee SHA-1: 7b599ef3c9d795633cd93ea0b0741a5721a675c9 SHA-256: c8746f896cf4b39a53a2357fb6bece9f5bd6caf673c8d6732904785aceac46b3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=free+powered+by+the+apocalypse+games PDF link annotation
    • http://silekutum.medianewsonline.com/estomatitis_aftosa_herpetiforme.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/pikivemomebesixado.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/buzagasivutidelavakije.pdfIn PDF document text
    • http://xokubenafap.66ghz.com/video_player_app_for_android_mobile.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/67606d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipewolitaden.epizy.com/a_verdade_sufocada_carlos_alberto_brilhante_ustra_download.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/93429012429.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_dd0a06e7db264678bbd755eb01131d57.pdf?index=trueIn PDF document text
    • http://buguwotibiven.rf.gd/stihl_chainsaw_ms180_spark_plug_gap.pdfIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_e6044c6f8d9d434588726766014f2adc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zinudipir/cursos_de_ingles_en_linea_gratis_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/xofede.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/bloomberg_lp_annual_report.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_b2fa7b39bcbf4921a133b00a5ec89c96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvazi/jemije.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/53927657837.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/fefuwotifajupuxaxe.pdfIn PDF document text
    • https://9329dc78-1a6b-4cc7-98ac-1b36262b7dd5.filesusr.com/ugd/d2be55_60c71f7c3a664968b5f40796874623c9.pdf?index=trueIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/botany_notes_for_ifs.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/469732732.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_off0001971e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1971E 5776 bytes
SHA-256: 4f4b5ca4dfc04e2f8fdcc4e065040418cbae93c46492b804489205b218ea5552
font_01_sfnt_off0001aab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB2 11104 bytes
SHA-256: bc782d527f67fefaf199acf7da765adc72e818904ec6b14a2fb9932f8c0e9f2f

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