Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6fc81a819fd641…

MALICIOUS

PDF

73.7 KB Created: 2021-04-15 03:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6d69f053db97f3323d45197b496b5255 SHA-1: 512ebf4f82db1b012f15ef83131a596b956f3c5d SHA-256: 3a6fc81a819fd6413fc77e31e6f5f86338a0323f96c2f3d9c244d3414befdd6b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing attempt by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to be related to the URL's content, suggesting a social engineering lure. The primary malicious URL is https://leonvi.ru/strik?utm_term=is+dante%2527s+divine+comedy+worth+reading, which is likely used to redirect the user to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=is+dante%2527s+divine+comedy+worth+reading PDF link annotation
    • http://lebepufu.mypressonline.com/miketilituzuzegedepos.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/2011_hyundai_sonata_hybrid_owners_manual.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/definition_of_mobile_technology.pdfIn PDF document text
    • http://redirunna.xyz/813381716889onak.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/9094142407.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/bpmn_2._0_download.pdfIn PDF document text
    • http://artistichomesolutions.com/jukuzafugikanefhcafa.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/14284047910.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/career_development_plan_examples.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/how_to_rewire_a_sprinkler_system.pdfIn PDF document text
    • http://trelon.fun/57860900826v1tbs.pdfIn PDF document text
    • http://bigswinner.space/83057508229kkjb1.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/apollo_12_mission_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagolabirej.atwebpages.com/atomicity_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/23619788767.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/did_elena_and_damon_die_at_the_end_of_vampire_diaries.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/nirevafurasutumakevo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/spark_john_ratey.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/ruwudalifigelenuwora.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/gewufivebes.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/tewipawevidumeja.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/atkinson_hilgard_s_introduction_to_psychology_free.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_off0000e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 5548 bytes
SHA-256: 2e76a3dd87eb748086c6620adf95ecfcfb1ba3a1bd31094abe06d8d13d5bf4ff
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 9856 bytes
SHA-256: 2cede27ad8d3c79661860f7e3018357af49446a37518978e3973394d7654e66c

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