Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b30ee7aed03d749…

MALICIOUS

PDF

75.2 KB Created: 2021-03-17 03:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e3ce2d9db0873e718ec7e1973c2f94c SHA-1: 506f02ecc7ddcfe70473ec0b73db4204a23f7b8b SHA-256: 3b30ee7aed03d74937debf1b41a7f276fd528d6553ebeaf659276e7a669f5a47
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs that likely lead to phishing or malware download sites. The document body, though heavily obfuscated, suggests a lure related to a calendar or report, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/wix?keyword=ufrj+2020+calendario
    • https://static.s123-cdn-static.com/uploads/4420224/normal_5ff98563d17fb.pdf
    • http://hq-cleartv.info/koziwepuvopexabizormcmh.pdf
    • https://cdn.sqhk.co/fumodolanes/vOihhha/2781128579.pdf
    • https://static.s123-cdn-static.com/uploads/4475406/normal_5fe2ae0a30187.pdf
    • http://policyhelpcenter.com/40809441163vsz4j.pdf
    • http://ubzvp.com/9419725850335z9x.pdf
    • https://cdn-cms.f-static.net/uploads/4486356/normal_600ff292d17a2.pdf
    • https://static.s123-cdn-static.com/uploads/4458125/normal_6003af8576ab4.pdf
    • http://digitalmedialit.com/dream_daddy_joseph_all_endings0lw2g.pdf
    • https://cdn.sqhk.co/bilexodofose/cf8ibbu/zara_boy_size_guide.pdf
    • https://cdn.sqhk.co/wawerugile/hc8D06z/83832297664.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fipijife/colne_community_school_ofsted_report.pdf
    • https://uploads.strikinglycdn.com/files/5b0c32b2-03e2-4ac1-bf15-557ebeaa5243/45477154760.pdf
    • https://s3.amazonaws.com/sezebepit/phonetic_chart_with_sounds_free.pdf
    • https://uploads.strikinglycdn.com/files/4d2b548d-c6e7-483c-9d51-c5d4a0150fb5/nancy_drew_season_1_episode_3_trailer.pdf
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_60a1b5c615274ff9a5bb16169045cc55.pdf?index=true
    • https://s3.amazonaws.com/zevutebulaworel/bhojpuri_movie_video_song_1080p.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/keberimupibudaboj.pdf
    • https://s3.amazonaws.com/patilawasu/zanewowizumut.pdf
    • https://uploads.strikinglycdn.com/files/b9a63b34-05f3-4076-9727-9302dbe1b63b/30228701209.pdf
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_06b5e56bbca64bd8952a61b49bc70ad1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/49aa04c9-ae48-4845-ab01-a1a1bc1b68af/37440086091.pdf
    • https://uploads.strikinglycdn.com/files/4730330b-35bd-4bf2-b2de-1f3a41eb779d/the_road_not_taken_summary_questions_and_answers.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_off0000e50f.bin
4a022e9febdf487720773f3f103d8f94ab2fbf2387f5b24eeaf6a2b284e01ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 5176 bytes
font_01_sfnt_off0000f6c1.bin
d5e1dcf459c280f2a1f921ffcbd12aef4ee6d9d063f7a188f13bb3d43bfe1e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 13012 bytes

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