Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03c1faf71a10fd6…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 12:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cbf522e38502e10a5f010b12d152c92 SHA-1: 7286ad40a5361c4c3ef1771a654e1858f5ee2cbd SHA-256: a03c1faf71a10fd6e930d05e07f6d18da608ed595251a63eab8e9f8cbbc9dbda
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=asp.net+mvc+select+db
    • https://cdn-cms.f-static.net/uploads/4370092/normal_60206111016ab.pdf
    • https://static.s123-cdn-static.com/uploads/4457332/normal_5fcabae605a8e.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/anarchy_workout_abs.pdf
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5ff56b08b580c.pdf
    • https://cdn-cms.f-static.net/uploads/4423780/normal_6020aace0b121.pdf
    • https://cdn-cms.f-static.net/uploads/4408009/normal_60306d3039c5f.pdf
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fe4eee03aa3c.pdf
    • http://pugorot.mygamesonline.org/a_report_to_an_academy_franz_kafka_summary.pdf
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5fca33da76516.pdf
    • https://cdn-cms.f-static.net/uploads/4496381/normal_6030095e1877f.pdf
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5feb40586fe8f.pdf
    • https://static.s123-cdn-static.com/uploads/4485301/normal_5fcdbc7d54eee.pdf
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5fc56bbdb62bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wolobugoxew.myartsonline.com/30151507271.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/lakopojeruvizipimelaz.pdf
    • https://s3.amazonaws.com/tezofuretejom/music_and_lyrics_imdb_parents_guide.pdf
    • http://lajovaputap.myartsonline.com/grammar_speaking_activities.pdf
    • http://xurosuforudev.atwebpages.com/how_to_find_a_person_by_picture_on_google.pdf
    • https://s3.amazonaws.com/jesidofefe/86826605193.pdf
    • https://s3.amazonaws.com/xakusineba/pozepul.pdf
    • https://s3.amazonaws.com/zarevizebi/best_android_phone_camera_and_battery.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ab.bin
be5c429362c0421224f463f56daa515851b85210f576b235cd154058a2e07dcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5132 bytes
font_01_sfnt_off0000fa1b.bin
47d4caf60ebf56708f8bcbec3f5260418c1c186d7daefa6759ed33d832a42606
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 11312 bytes