Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0674dc91be5717e…

MALICIOUS

PDF

70.4 KB Created: 2021-03-06 20:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8bfd2de3bc2d6bb8dff211b1c9e68106 SHA-1: 9880fb7a26c5514db3d75ebc1ea7421bf3445f7e SHA-256: e0674dc91be5717e04e2bc866aaca8d40f8eff85e0078ba6e51c3753755bfa87
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, appears to be related to the search term '4th and goal 2018 unblocked at school', suggesting a lure to a phishing or malware distribution site. The presence of numerous links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=4th+and+goal+2018+unblocked+at+school In PDF document text
    • https://cdn.sqhk.co/dilujuzaga/oxiXlje/xosogurogakik.pdfIn PDF document text
    • http://suruwafid.22web.org/pipeposobularajun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60145f33be500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fe33cc328a43.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/where_is_the_bluetooth_antenna_on_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fc91b71475db.pdfIn PDF document text
    • http://defumemijiwof.22web.org/simeg.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/875B1je/vowibarujizudozolemag.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/Gxiagfc/soccer_heroes_ultimate_football_game_2018_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/f3Zidwp/glass_water_bottles_1_litre_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5ffd84441d333.pdfIn PDF document text
    • http://pavezala.iblogger.org/grepolis_report_converter_greasemonkey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_601ffd27a7caf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_7087aa66f2f24e5cba2855e63bed18ec.pdf?index=trueIn PDF document text
    • http://bekonoxidolu.rf.gd/10495504679.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_b2b2b8f9fac8448da958d15d40c14db6.pdf?index=trueIn PDF document text
    • http://lisirowi.rf.gd/70423380004.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_0332686fc2f746418aa1fb4e65888245.pdf?index=trueIn 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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5820 bytes
SHA-256: 473e1e4f3e45eae9d0804f470101bafe4093d6d9c0d872a33a054296a468e8b9
font_01_sfnt_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 10148 bytes
SHA-256: c5bae443fc931caea1765c612391d500e56b0a42e324883fa91059f7571f7787

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