Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b8cc6057bd6d57…

MALICIOUS

PDF

68.2 KB Created: 2021-03-25 18:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2871721112a62339a51a178c93474d9a SHA-1: d67a1b9702a12101b93f421f22f15edaa4d7e31c SHA-256: b3b8cc6057bd6d5717b263444349eb0c6b6479460e0d7f99c34dddb5af90e104
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that leads to a suspicious domain, likely intended to host malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

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://leonvi.ru/wix?keyword=living+environment+regents+review+2019+answers
    • https://cdn-cms.f-static.net/uploads/4462345/normal_602493ebba6e8.pdf
    • http://kpovli.ru/pogirogezt9u4p.pdf
    • https://cdn-cms.f-static.net/uploads/4490534/normal_601d634acab02.pdf
    • http://powerhdniy.space/26801848090xescj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zukogi/xedopuriz.pdf
    • https://uploads.strikinglycdn.com/files/ff0b0bab-30eb-4cef-8d5e-562923c01589/why_does_my_cursor_disappear_windows_10.pdf
    • https://s3.amazonaws.com/tafogusegabomu/intent_chooser_android.pdf
    • https://uploads.strikinglycdn.com/files/690156c1-9ddc-4c7e-914b-23aee9473f35/71621907782.pdf
    • https://uploads.strikinglycdn.com/files/d06c9772-d722-4bd9-9fba-395c3a14d51b/what_is_the_meaning_of_the_phrase_happy_isles_in_the_poem_ulysses.pdf
    • https://uploads.strikinglycdn.com/files/b2759ac8-efd4-41b0-ba2a-843e643b3a39/woodcock_johnson_iv_test_of_cognitive_abilities_sample_report.pdf
    • https://uploads.strikinglycdn.com/files/c1c563f9-e77d-4301-bfaa-a698563d1343/xajeb.pdf
    • https://uploads.strikinglycdn.com/files/0d7fefd7-5f06-4221-adc3-cdac6031f70e/css_the_missing_manual_github.pdf
    • https://uploads.strikinglycdn.com/files/7defe6ec-0619-45cc-a8f9-9d3accdfae16/how_much_to_rebuild_nv4500.pdf
    • https://s3.amazonaws.com/fovezewi/33253427121.pdf
    • https://uploads.strikinglycdn.com/files/4c8878e0-00ac-41a6-9bae-7721be7e4a29/what_is_the_meaning_of_historical_context_brainly.pdf
    • https://uploads.strikinglycdn.com/files/92903ba6-006b-43ed-8803-fffbb6c44165/jofexusalix.pdf
    • https://uploads.strikinglycdn.com/files/dab5e906-06c3-42ff-a9ca-c06fb21fd5df/what_is_a_perfect_tense_verb_in_french.pdf
    • https://s3.amazonaws.com/fofeguj/29821650846.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_off0000ceeb.bin
ab222541fc121acc293775b90530c6f9c975ff53b3ee7b0a31461614dd1b3b60
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 5548 bytes
font_01_sfnt_off0000e1d1.bin
543007c377e367c348cc2cb11ecd2b1f214fe4d523935d6abc41450d864e63b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 9928 bytes