Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3840b2561663e40…

MALICIOUS

PDF

114.0 KB Created: 2021-03-16 01:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5491bfbeebff2a989870b9d200a94d98 SHA-1: 6492b9cf3c238314667c37e04a3cde669850a132 SHA-256: b3840b2561663e40e60569e11b35bb4832db2af1df778578d8d1cf989ea6b0f6
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing activities. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Pathfinder stolen lands'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://midufefew.ru/strik?utm_term=pathfinder+stolen+lands+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416501/normal_60308677c7b78.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/fevicol_bedroom_design.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483855/normal_5fddc40d97590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_603034b7b8191.pdfIn PDF document text
    • http://xodulik.66ghz.com/chrysotile_cement_sheet.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/jesuit_oath_of_the_fourth_vow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389582/normal_600639e4ddd3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kojomazudogog.epizy.com/cessna_172n_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/bematool_4_pro.pdfIn PDF document text
    • http://bipofixijanafuf.rf.gd/tb_guideline_tanzania_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4713ff-2419-41d7-acf7-4761d5e2b27b/tipos_de_sistemas_operativos_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/kaparirogovoliva.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/letter_of_consent_sample_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/todovemovupixum.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/synonyms_and_antonyms_words.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/girinugalil.pdfIn PDF document text
    • http://kefasakawig.rf.gd/44818270393.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/finiluxanukazojodowuxudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/47118924552.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/the_circular_ruins_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/xifawenoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1adbec7a-ebb9-45a9-9104-3a4388b25a07/beginner_weights_program_female.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/according_to_matthew_sri_lankan_movie.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_off00018209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18209 5132 bytes
SHA-256: f969b7bd06c8bb63c4123f8ec4fe31eb505dc1316fc2724d9b59356260281b58
font_01_sfnt_off00019378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19378 11376 bytes
SHA-256: aee7741fd202065bbed30fdc91cad3404ed770f8c7d05455e1fff1026e7a5e58

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