Malicious PDF — malware analysis report

Static analysis result for SHA-256 423c8b043bb65ac1…

MALICIOUS

PDF

80.0 KB Created: 2021-03-20 07:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0c411846162e08ad83fa8275352350f9 SHA-1: 248ddcda4adcdb8c5d1a8a03a59e79f2390982d6 SHA-256: 423c8b043bb65ac1a4d2f504eff610b0eb0505ba143956380e9e5ba8503d95af
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and services like Weebly, suggesting a phishing or scam attempt. The presence of 'blufftitler full crack' in one of the URLs indicates a lure for pirated software. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/123?utm_term=blufftitler+full+crack PDF link annotation
    • http://redarirot.iblogger.org/17270160026.pdfIn PDF document text
    • https://vaviwajefumizin.weebly.com/uploads/1/3/5/3/135348181/8135100.pdfIn PDF document text
    • https://vazarilixigoro.weebly.com/uploads/1/3/1/6/131636807/9339253.pdfIn PDF document text
    • http://kigurumi.org/clasificacion_de_los_numeros_decimales2f6yu.pdfIn PDF document text
    • http://lefenup.22web.org/doronasi.pdfIn PDF document text
    • http://hocostyle.ru/cambridge_preparation_for_the_toefl_test_book_with_online_practice_tests_gratistjwmg.pdfIn PDF document text
    • http://mx50off.info/peretizaxewukinunejuk9edc.pdfIn PDF document text
    • https://gamabisage.weebly.com/uploads/1/3/2/6/132681080/gubed.pdfIn PDF document text
    • http://xemopubuga.iblogger.org/sowopono.pdfIn PDF document text
    • http://liseveziko.iblogger.org/what_is_alphatrak_control_solution.pdfIn PDF document text
    • http://kokilubowo.22web.org/amplificateur_operationnel.pdfIn PDF document text
    • http://groby-ritual.online/72060012948u0fb5.pdfIn PDF document text
    • https://ravawesasusede.weebly.com/uploads/1/3/4/5/134517270/76206.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/4e3e2b66-65b4-4b48-98e5-d16b520bddc2/gatozukelogamubaji.pdfIn PDF document text
    • http://juwikoramet.rf.gd/13253222467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56dc67a9-c157-4315-87bc-c68e5a13fb02/what_foods_does_not_have_gluten.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_0e96cf8cee994a45a9428286feeaaec1.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_f6a3465034424d9e95249956cdf54cd4.pdf?index=trueIn PDF document text
    • http://nunivigel.epizy.com/99795801468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccd8448-0ee8-4120-99e5-17c2244a1e47/8733369270.pdfIn PDF document text
    • https://da88601c-d7b1-4d42-bebc-9891560a8d86.filesusr.com/ugd/69695d_7e519cbcf2f544b8897d07012010c83d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d84e4-65fe-40b9-a416-b56b5f947c95/vupafusuvorasisasidukuwu.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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 4812 bytes
SHA-256: c68434c6dfc82b7bedf1cbc146cb025ff4e014fa569616e6802eb775a186e85b
font_01_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 24192 bytes
SHA-256: b708b7aa7d935cab763a993a4717c3ff9ff184462a93f6e56f4b2975521c87c7

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