Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0757ba7fa6d9dd…

MALICIOUS

PDF

73.3 KB Created: 2021-02-17 06:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c24ec8d1cbbc14a2c231e3ba1111c4d SHA-1: f68c38af827b6df6e74e7bde80f9edb316bbe18f SHA-256: 1f0757ba7fa6d9ddb017f7da1a20565e54fe5738c513b8b5dc98c2d5b7cd2561
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing or directing users to malicious content. No scripts were extracted, but the PDF structure itself likely facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=daphnia+tank+size PDF link annotation
    • http://sumemejosanavo.iblogger.org/fixed_cell_reference_google_sheets.pdfIn PDF document text
    • http://kutufirix.iblogger.org/96745564024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofosuxubajo.epizy.com/66916165065.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/denugujafabonexis.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/mudamerefasekejezelu.pdfIn PDF document text
    • http://taguramol.rf.gd/wateraid_international_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/vexobuwemalumotizofalabi.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/28436211798.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/annona_muricata_antioxidant.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/angielski_czasy_przesze_wiczenia.pdfIn PDF document text
    • http://wiwawilif.epizy.com/ritasiwarebozapag.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/onesignal_android_example_github.pdfIn PDF document text
    • http://tuxexagixib.rf.gd/wegazawejugefewerakimipil.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/povikerebi.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/online_defensive_driving_course_answers.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_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 4892 bytes
SHA-256: 716a204e8a3681cd3e5edbe4a5e8907aef8104002b36e7b4320ef566ab6224b2
font_01_sfnt_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 10808 bytes
SHA-256: cdbfc024a8963c3ffbcbaecaffd9a080e10264bf132d8f690cbb1ced1bb7c996

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