Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee0d3588b1babbe…

MALICIOUS

PDF

70.8 KB Created: 2021-02-17 09:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3bae0eaba3bdd8fd74ee1c0d79630379 SHA-1: dac425d2b1583a3c6408130ae66684bc97b24938 SHA-256: bee0d3588b1babbecf873885a80b62ef498749b73078c859f5147c33c225379c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=tipos+de+relaciones+en+diagramas+de+clases'. This indicates the document's primary purpose is to lure the user to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to deliver a secondary payload or phish for credentials.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=tipos+de+relaciones+en+diagramas+de+clases In PDF document text
    • http://waystep.site/pixegovulula2o3kz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427091/normal_5fcea33558721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_6023e1fa6d45b.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/appium_c_android_tutorial3dugl.pdfIn PDF document text
    • http://myluckywin.site/rpg_maker_vx_ace_lite_crackvw2jp.pdfIn PDF document text
    • http://fdvsefwfrw.space/ainsi_va_la_vie_max_et_lili92t7b.pdfIn PDF document text
    • http://domainlimax.xyz/gegekodopii3n0o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_60259c5ce4497.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/2017_chevrolet_tahoe_lt_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/adobe_suite_cc_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/ferunuwepe.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/moonkin_pvp_guide_3._3_5.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/32368763075.pdfIn PDF document text
    • http://vuriruzuminomu.epizy.com/97016607172.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 5340 bytes
SHA-256: 1f4be0c3177e87828fc3a844870884e979695ced895520a90b7ae83688630e36
font_01_sfnt_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 11824 bytes
SHA-256: c8976260f61e243e5b021096cc77c9b4c12a74c36f830c35720100c7a3efa38b

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