Malicious PDF — malware analysis report

Static analysis result for SHA-256 828135dffe38966b…

MALICIOUS

PDF

73.4 KB Created: 2021-06-09 21:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 04617ff6dba0c38c47014fef2a68a493 SHA-1: 59f7e4e4ec448f16caddad888fb96072f5153794 SHA-256: 828135dffe38966b0c4915f767938972fa767456a751b2047c2515128b6d595e
96 Risk Score

Malware Insights

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

The PDF document contains embedded text referencing 'Laker company' and a suspicious URL, suggesting a phishing attempt to direct users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards potential exploitation or redirection, likely involving JavaScript for execution.

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://wastran.ru/pbw?utm_term=laker+company+reported+the+following+january PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389603/normal_600771cc91e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_6065c8260088c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_601a551216f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_603f99c563bff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fce958d75003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416791/normal_6007ed5c467db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_60283e99d6d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_600fcf844b2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_600b78c86a1a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_6005c5725d005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_6057e3cc00c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_6062dfb9b0ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_606132ee73125.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/d63146d1-5164-457e-b610-ba29be0590da/gta_5_mobile_apk_free_download_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe99410-25ed-480f-b2fe-bd14c2bd9902/38779455901.pdfIn PDF document text
    • http://jizakatum.pbworks.com/f/que_es_annuit_coeptis_novus_ordo_seclorum.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/67064138983.pdfIn PDF document text
    • http://pewudomame.pbworks.com/f/2078690429.pdfIn PDF document text
    • http://supulilofib.pbworks.com/f/rihanna_we_found_love_download.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_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 5668 bytes
SHA-256: 743351d201febe9edf6b22c662121f7238e146b0c13a50f5395eb35df189ebd8
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 11404 bytes
SHA-256: 23044c264e85fcf4a12547c0854de0c51dbbe79611bc9498c9bf37caf8e4f843

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