Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf708673fa1053f5…

MALICIOUS

PDF

84.6 KB Created: 2021-03-18 19:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ae0725c676fe48e6c63a3a5468c858 SHA-1: 01b24b67ee34337fa53717df1ee93965293bcb99 SHA-256: cf708673fa1053f51cafd830592853b6f85fce8ff914b620a6a03a544a9ee7b7
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 URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'general electric universal remote'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=how+to+use+general+electric+universal+remote
    • http://in-arenas.com/39287671725ln4oc.pdf
    • http://meroxisawifagu.mygamesonline.org/jspdf_html_to_angular.pdf
    • https://cdn-cms.f-static.net/uploads/4446017/normal_6038b68fb6ff2.pdf
    • http://norikaloro.mywebcommunity.org/7th_grade_math_diagnostic_test.pdf
    • http://mailedflkf.site/povorimhnxsd.pdf
    • https://cdn.sqhk.co/nojebimit/guS2haU/sesetazinodutiw.pdf
    • https://cdn-cms.f-static.net/uploads/4409801/normal_603913b2336ec.pdf
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5fdc729becdb5.pdf
    • http://poradoit2.site/bsc_agriculture_colleges_in_hyderabad8uwuf.pdf
    • https://cdn-cms.f-static.net/uploads/4393189/normal_601fee41048d1.pdf
    • https://cdn-cms.f-static.net/uploads/4387218/normal_600ebf561b575.pdf
    • https://cdn.sqhk.co/besogevipadi/doFjinB/26124171511.pdf
    • http://kugewezebuvigiw.mygamesonline.org/64230621164.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ef987df1-eacb-41fd-9603-9490cbb02c89/what_are_the_safety_signs_and_symbols.pdf
    • https://s3.amazonaws.com/nedijowewoded/belling_gas_cooker_repair_manual.pdf
    • https://s3.amazonaws.com/xarojapi/which_iit_is_best_for_msc_physics.pdf
    • https://uploads.strikinglycdn.com/files/2ecef697-1e73-43b9-949a-bea162fa74b9/wodafosidazol.pdf
    • https://uploads.strikinglycdn.com/files/cef5a4eb-e115-4a14-835b-57ca21c17788/40909081548.pdf
    • https://uploads.strikinglycdn.com/files/cd9f92c6-350b-424f-8e32-101649e5ac5a/64435660323.pdf
    • https://s3.amazonaws.com/zisulamisozoto/losatikemapatusiwile.pdf
    • https://s3.amazonaws.com/nitizobuv/xabigu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010097.bin
2f5b5d143e9288608f8c748bbff60de94364a6b1ae69daf8a372c5a188f2099a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 5116 bytes
font_01_sfnt_off000111f9.bin
fbda222ba1d49a15060b45377258a2e4691ad0de2ae5f57b8b4385772a405ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 10884 bytes
font_02_sfnt_off00013706.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13706 4324 bytes

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