Malicious PDF — malware analysis report

Static analysis result for SHA-256 99114888f901aa75…

MALICIOUS

PDF

81.8 KB Created: 2021-03-06 01:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 45e71707338305c8bb2e3d2302db412c SHA-1: ed016d86844de1a517d18f737baf3945e1257905 SHA-256: 99114888f901aa757095bd5ed94e0b26659da4e398d4406e1d909344f3c6a023
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 0.9990

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://druttle.ru/wix?keyword=survivor+season+7+rupert PDF link annotation
    • https://cdn.sqhk.co/mivezifov/rQihhif/stress_management_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/jji5jcV/electronic_music_festivals_2019.pdfIn PDF document text
    • http://freshka.fun/furia_de_titas_2_completo_dubladon7t32.pdfIn PDF document text
    • https://tatimaguk.weebly.com/uploads/1/3/4/7/134718839/wapefadik-mojuvabixoriwa-puxuxomigig-kuzeduderuzurob.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/1574137.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/hehbvgh/lebara_mobile_number_to_check_balance.pdfIn PDF document text
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/365eac207ed420.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxobilan/hBGEqhd/aliens_vs_pinball_nvidia_shield.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/gipur-najopapanem-zuvisinefu.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/tgZhgi6/fawowosurejewezamiz.pdfIn PDF document text
    • http://medyahanem.com/contagious_free_downloady5cot.pdfIn PDF document text
    • http://insurancecarusa.com/shatter_me_lindsey_stirling_ft_lzzy_hale_mp3_download7acci.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/20fa2591fe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/punagilelabon/vuruzubibipelebuzulototaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/87889792845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fd93b1-2267-416e-a6da-7ebc9a6d3fbc/fikudiketasepubefu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/86318544036.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/air_accident_investigation_reports_uk.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_67341b4b8184450ab8acf96dfecc46bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f11335-ad43-4430-87b9-03c187694efa/splinter_cell_chaos_theory_ps2_vs_gamecube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42698f87-8a95-4499-b17b-023b6029e20d/burger_king_allergy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e675cb-d7ba-4253-8d6b-3407a968bbee/96212316861.pdfIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_3503ccc124564e13ad290f2689032166.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/73313485057.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 4904 bytes
SHA-256: d07b57dbf4ec92cbb646fb9dded39ec2bdb8da5270c6e5e2e53ffa3697c8e839
font_01_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 10704 bytes
SHA-256: 831224f89e64354ec0b46beedaae8ec6f2d3d6783efa10ca7c22eacea6e4b2b7
font_02_sfnt_off00012ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34