Malicious PDF — malware analysis report

Static analysis result for SHA-256 e673d4833dbe44d7…

MALICIOUS

PDF

81.6 KB Created: 2021-04-01 14:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e78b90f1d5aa34aaf424946200af03ee SHA-1: 7c50b81cfb6bf0cd3f4c5f49cf91dd01b7faa060 SHA-256: e673d4833dbe44d77a618a4e0a40f1077ff2569f78b297d11dc9934f372c8c5b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://lozipotod.ru/aws?utm_term=where+is+the+seven+deadly+sins+located+in+the+bible PDF link annotation
    • http://bijeledi.iblogger.org/air_conditioner_heat_load_calculation_sheet.pdfIn PDF document text
    • http://tryadasert.online/42066272394glpf7.pdfIn PDF document text
    • http://spencermcman.us/70875440193mscut.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/xepuxijeuae3.pdfIn PDF document text
    • http://podarokinsta24.online/14399980862r5w8i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_3ac559d013d140adbfca526d0e827032.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/activity_settings_android.pdfIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_eafe015eaa2c49f7b853803e94758d29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remeranexe/tektronix_2445b_oscilloscope_service_manual.pdfIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_a6bee376d4c74fa3baeadb9267a0ef0b.pdf?index=trueIn PDF document text
    • http://memaded.epizy.com/45474985352.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/fairy_tail_theme_saxophone_sheet_music.pdfIn PDF document text
    • http://bilixovat.rf.gd/how_to_get_rid_of_back_fat_gym.pdfIn PDF document text
    • http://pikugire.epizy.com/vitamin_a_foods_list_in_telugu.pdfIn PDF document text
    • http://xawosote.epizy.com/11290585396.pdfIn PDF document text
    • http://javasuk.epizy.com/breeam_new_construction_fee_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/8708341416.pdfIn PDF document text
    • http://jexawatenafule.rf.gd/55318417549.pdfIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_26b1dfc95ed24381a2b1413d3beb0bd3.pdf?index=trueIn PDF document text
    • https://bfb79b04-db4d-4c54-a74a-4733ff68ceb9.filesusr.com/ugd/11291b_fe12eb945d1842e69a59c42b5cb57845.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jimugivos/how_to_solve_data_interpretation_questions_fast.pdfIn PDF document text
    • http://jumezezufa.rf.gd/algebra_consecutive_number_word_problems_worksheet.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_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 5344 bytes
SHA-256: 8ce53dd70caa2995b0892b98aa8a286aaba04f2658a0b48d7a37087470aa5d1e
font_01_sfnt_off0001114f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114F 11384 bytes
SHA-256: 50e70f85aaa989b09e6419db5f28ec04134558d046d3b69dc128435a4dae76c3

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