Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4cd34f62b63a1f3…

MALICIOUS

PDF

75.3 KB Created: 2021-05-03 14:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a303a125f0c9b0a0f372fa953ea5ab5 SHA-1: e1ac0e7ba7c7e3e2dd86bb3d1be141b75086a162 SHA-256: a4cd34f62b63a1f36dd38435b396d37174f9ac7865d70550178d2b7cfa20d1c1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user interaction via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=the+vampire+diaries+quotes+about+love
    • https://cdn-cms.f-static.net/uploads/4384469/normal_604631fe12157.pdf
    • https://cdn.sqhk.co/runudori/cFerWgg/sixitaroseropelajen.pdf
    • https://cdn.sqhk.co/zelosoza/WiakkOu/bedimenojeweno.pdf
    • https://cdn.sqhk.co/xolanikipiz/ohgifWf/bingo_blitz_download_for_pc.pdf
    • https://cdn.sqhk.co/sukonazukuv/oy6kXhd/tufefulupo.pdf
    • https://cdn-cms.f-static.net/uploads/4419847/normal_606a0626468fe.pdf
    • https://cdn-cms.f-static.net/uploads/4382790/normal_605ef6a4c939b.pdf
    • https://cdn.sqhk.co/zaliroded/dyibOji/38320057238.pdf
    • https://cdn-cms.f-static.net/uploads/4466364/normal_606790ff9e899.pdf
    • https://cdn-cms.f-static.net/uploads/4411219/normal_603db400b8d13.pdf
    • https://static.s123-cdn-static.com/uploads/4388169/normal_60040b3faffd8.pdf
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fe15829bf000.pdf
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6024af00c2435.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sipopos.epizy.com/nanuma.pdf
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_3985df9c89044ca9be49a46724f2b2f9.pdf?index=true
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_71ce8e5922ad4d368f3497eeecfde508.pdf?index=true
    • https://s3.amazonaws.com/sesijesule/kayn_jg_guide.pdf
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_57ffdf808b8e4dd1a3360ba4787d7984.pdf?index=true
    • https://s3.amazonaws.com/dogazisuze/xitonuke.pdf
    • http://rakimeramut.epizy.com/math_logic_puzzles_printable_high_school.pdf
    • https://s3.amazonaws.com/jeworurowam/call_me_by_your_name_online_watch.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/pofobu.pdf
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_08f6198160af4041a93e218bfb3d90dc.pdf?index=true
    • https://s3.amazonaws.com/wizomoravazub/android_sdk_path_unity.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_off0000e803.bin
162a92b7d594f3f9e11ced6c8a3f23e03c17aa0fe51bda4ba39c67e4c36af35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 5472 bytes
font_01_sfnt_off0000fa6b.bin
dca91f8504a5dc4fd277b886d9e52326907b0164967db2c71773263683b5a362		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 10448 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.