Malicious PDF — malware analysis report

Static analysis result for SHA-256 2008d379603e3c40…

MALICIOUS

PDF

78.1 KB Created: 2021-02-11 08:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6be9effd7d1d49677e095a5e57df7f96 SHA-1: 15ea930390bab42243228842be26af74022cd5e0 SHA-256: 2008d379603e3c4089dfe0fbc2eebbb8cf211d2943c588484ce7c49ed3f0ae93
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that likely serves as the primary lure for the attack. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious external resource.

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://jacksth.ru/123?utm_term=another+word+for+overwhelmed+or+baffled PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fff08f2e150a.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/jaEibhb/71096273449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_6010ae8667673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fe70dcbd543f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_5fd199b4b93bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366980/normal_5fed3a3c775f6.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/ddjigfT/39897826666.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ghghjaK/read_along_the_lines_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/i6gfH5o/78873237219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_601dbd1d8d1f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427785/normal_5fee4bcf90f5e.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/hNhjHih/graphic_design_apps_free_ipad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5ffa35103e530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_60131936a472b.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/hqhhhgc/star_wars_galaxy_of_heroes_event_darth_revan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_5fd856c84de43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5fc9381370942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5ff363182de44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/smadav_antivirus_2018_offline_installer.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_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 5252 bytes
SHA-256: d1b2da5974e99b40883c925de9ee21334f869746425c2b430c87ca194be1b889
font_01_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 11532 bytes
SHA-256: 67957bbe7bc29f6a694a218c58413163dd18a1927e5805228bf481b84034e075

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