Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f1bd10a98ce9fe…

MALICIOUS

PDF

78.9 KB Created: 2021-03-14 20:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5b8a465b059afa4ff4e82945bb11a76 SHA-1: 5a11be0e1fd5d54f6539a1701452ca25dc36eb39 SHA-256: f2f1bd10a98ce9fe2123e3ec9f12c14b7497fd442a09537f3c4af02e4899d900
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 0.9997

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
  • 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://jottigo.ru/strik?utm_term=the+merchant+of+venice+act+1+scene+1+short+summary PDF link annotation
    • http://ibkreactiva2020.com/kobagidapkhro3.pdfIn PDF document text
    • http://vedice.ru/jobinupaminepebipofos7u4tt.pdfIn PDF document text
    • http://lapafuros.22web.org/xozagowe.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/physics_volume_1_5th_edition.pdfIn PDF document text
    • http://toppiksnack.xyz/4361045707unkwj.pdfIn PDF document text
    • http://stav-games.ru/asus_double_450mbps_n_router_troubleshootingrl11z.pdfIn PDF document text
    • http://rameduliru.iblogger.org/aws_practitioner_exam_questions.pdfIn PDF document text
    • http://kagiburof.iblogger.org/mla_8th_edition_annotated_bibliography_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokevojufepizi.rf.gd/negative_mandatos_tu_form.pdfIn PDF document text
    • http://dodarululi.epizy.com/world_breastfeeding_week_celebration_report.pdfIn PDF document text
    • http://lubozudaxik.epizy.com/narasotinelokiwomeke.pdfIn PDF document text
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_e4d1bfb0fc3c49499cc6373bc5d2e2ca.pdf?index=trueIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_5431e36f62814b779539496a3e109395.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_8a2f566f3c294b88acfc766ec0f82ee6.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_20734108fbe54cf1af2db9299cde89da.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/how_to_setup_dvr_for_remote_viewing_ddns.pdfIn PDF document text
    • http://sigogijukajuli.rf.gd/98716002298.pdfIn PDF document text
    • http://wikatamuk.rf.gd/aristotle_poetics.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_8de7994a6bf24505aa0f5992d1012ef5.pdf?index=trueIn PDF document text
    • http://lupidew.rf.gd/73950742395.pdfIn PDF document text
    • http://soreras.epizy.com/the_city_and_the_city_book_ending.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_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 5252 bytes
SHA-256: 6b9c09deace1937921a6a8d44bda125f53e800a516e31924477cbb03c46eb7e6
font_01_sfnt_off00010914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10914 10820 bytes
SHA-256: ef71b69985e073f2e4b8ebdcb121b37f8fe800d613555160d11f37ce8d80d88f

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