Malicious PDF — malware analysis report

Static analysis result for SHA-256 138374bffdc72e14…

MALICIOUS

PDF

72.8 KB Created: 2021-02-20 21:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e80a4588621718bffa3b3e61f346c00e SHA-1: 0710c46adce61dba2f513eac99bfb6adb58ef748 SHA-256: 138374bffdc72e14952927b9e4ba44f7bfe372c051b18215450c193a587d7e6b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=sweet+letter+to+my+boyfriend+in+jail In PDF document text
    • http://lovechat24.club/sekefogumudivzv8e.pdfIn PDF document text
    • http://itclick.info/what_things_should_a_first_grader_know36mxb.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/gdgcgdl/all_video_downloader_app_apk.pdfIn PDF document text
    • http://eushopvmn.site/supermarket_flowers_piano_sheet_music_accompanimentrhvds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_5fdc61f74dfa6.pdfIn PDF document text
    • http://farvestnn.ru/7042386370021vz9.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/CjcJLjg/42278502657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_602d9514cf99d.pdfIn PDF document text
    • http://comforfemj.fun/free_proofreading_and_editing_worksheets_grade_5l9pmu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1834de4f31.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/gj3skej/6354454486.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/aaGggFf/idle_medieval_village_3d_tycoon_games.pdfIn PDF document text
    • http://help-mediasupport.com/196118955386di60.pdfIn PDF document text
    • http://frukt.space/gimalotodusupuwoledademodsbo9c.pdfIn PDF document text
    • http://securespot.ru/41099146998f9wiw.pdfIn PDF document text
    • http://max-lifting.store/dopenajimowobimaniweboggr62.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/wowonesoribu/83690008092.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/linking_verb_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/collage_maker_app_free_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/cdri_full_form_disaster.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5388 bytes
SHA-256: 63d369e2368bbceeed3b7d628b2bace524132a552d983b6ca5fc82ba2ab7dd4b
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 10772 bytes
SHA-256: a476ccb8b940d93a5451840f5884b19cd15f2c2a52006fa911290144443f0b30

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