Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eef544d0e4fa14a…

MALICIOUS

PDF

78.2 KB Created: 2021-02-23 03:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1ca15f84c55901b854fb0e1a7a794391 SHA-1: 58650f8c76aacbec5de4aade6d3857a8eca48046 SHA-256: 8eef544d0e4fa14a1bade39ff1a3c4ce5fc40b882758ed06380259d84b7bf2a9
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to chemistry and application metadata, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+is+formed+when+two+or+more+atoms+join+together+chemically PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5febeacfd4752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_602c2816c33d2.pdfIn PDF document text
    • http://gratoramaa.website/afternoon_with_irish_cows_literary_devicesry3te.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5fe48c56297ad.pdfIn PDF document text
    • http://winoraama.space/485028647323jq1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_60183e27b981f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493200/normal_5ffe8b033bf2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fd7d0a474557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5feea49cf1939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_60343429e1b32.pdfIn PDF document text
    • http://normal-id.com/resumen_del_mito_de_las_cavernas_de_platon0d4bi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_60321963ae94e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5fcd8314d9dc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fe35f334a4fa.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/tutapaxi/metformin_stada_500_tri_benh_gi.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/tamil_daily_sheet_calendar_2019_july.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/you_are_the_reason_song_muzmo._ru.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/kurukshetra_university_bed_exam_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/dutovufusoko.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/wunilivalopotijo.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/chronometer_countdown_android_example.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 5716 bytes
SHA-256: b777854ab192e41e9685ab3115b2fba8fdab0363ea4d847749925368179a51d5
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 10620 bytes
SHA-256: 5695a03051dcd198b9aa45caf1de8883b2935614d757f45cb9d101c642a8dc14

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