Malicious PDF — malware analysis report

Static analysis result for SHA-256 b496938a4322e6fd…

MALICIOUS

PDF

86.4 KB Created: 2021-04-03 17:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1913844030abb364b9ffd189d533688 SHA-1: 9a36e7ea81035b936441003eaba51bd1c31d3ba2 SHA-256: b496938a4322e6fd8abe35b4dae9455e23de2615fd8b628d402c223050f4fc3c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. ClamAV and ML classifiers also flagged this file as malicious. Although no scripts were extracted, the presence of external URIs and the overall detection score indicate a high likelihood of malicious intent, likely related to spearphishing.

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://ponafet.ru/strik?utm_term=the+end+of+the+affair+movie+review
    • http://bagawixaj.mywebcommunity.org/new_elementary_mathematics_syllabus_d_1.pdf
    • http://docita.fun/fighters_block_not_workingdslht.pdf
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fe132a8e2647.pdf
    • http://mikovil.mywebcommunity.org/guwexizizeneju.pdf
    • https://cdn-cms.f-static.net/uploads/4374532/normal_60401853df6da.pdf
    • https://cdn-cms.f-static.net/uploads/4403947/normal_605bb94b94ea8.pdf
    • http://negozio50sconto.info/how_to_adjust_ge_oven_temperature96f9b.pdf
    • http://lamanixumerad.mypressonline.com/wumukofesupuladabelus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c560a7c9-f98c-463e-a9c8-5b43c8d4ccc8/go_math_practice_book_grade_4_answer_key_chapter_3.pdf
    • https://uploads.strikinglycdn.com/files/de95cbc6-dc6d-460e-b5dc-d0d63840496b/jebarozebatosiji.pdf
    • https://s3.amazonaws.com/nagudo/what_type_of_compound_is_hcn.pdf
    • https://uploads.strikinglycdn.com/files/b47731f5-82cb-43e7-8b2b-3fd313360463/22261247055.pdf
    • https://s3.amazonaws.com/badodemebo/balamuralikrishna_songs_free.pdf
    • https://s3.amazonaws.com/pajukovuxetu/11523169318.pdf
    • https://s3.amazonaws.com/patotale/binodini_dasi_autobiography.pdf
    • https://s3.amazonaws.com/veraxawewib/beats_studio_1_wireless_replacement_ear_pads.pdf
    • https://uploads.strikinglycdn.com/files/dd9e4699-4b26-4bdf-a912-53e89c413392/epix_war_of_the_worlds_full_cast.pdf
    • https://s3.amazonaws.com/jawusawar/1519121990.pdf
    • https://s3.amazonaws.com/winumigutam/sinuj.pdf
    • https://s3.amazonaws.com/semuxemakaw/27487543749.pdf
    • https://s3.amazonaws.com/rumezo/soundhound_for_pc_windows_10.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_off000117b7.bin
ce78086a1ef89dc5e0c6f284e6067f51631f9931557a534ca83e59f167e977c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 5040 bytes
font_01_sfnt_off000128c5.bin
6c02ae61b4a7f7f03e7d5f7ff0c63705286f1ce86b8c810d127ae04ad399f05c
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C5 10772 bytes