Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1550413de4f7718…

MALICIOUS

PDF

66.7 KB Created: 2021-03-08 02:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e35714f8aec8a853fdede859e5a148f0 SHA-1: 05d35d835cf7a86edf845998d0a16fe9a9e246d4 SHA-256: b1550413de4f771806d4ee46588549d59f0401883e7d37cb30156d4c437c322c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=24+hour+fitness+979+broadway+millbrae+ca+94030 PDF link annotation
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/5757442.pdfIn PDF document text
    • https://fevenegor.weebly.com/uploads/1/3/1/3/131380973/bejuvidesadike.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/ihbBgDy/97504421807.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/bezovofumilosegi.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/22cf9adc7.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/ljhiajg/78289063908.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/gRGidja/home_design_paradise_life_mod_apk_android_1.pdfIn PDF document text
    • https://najabokaxosol.weebly.com/uploads/1/3/5/3/135300306/robisosunow-burixu.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/jjbYbhb/goluvog.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/ietmijK/linkedin_careers_search.pdfIn PDF document text
    • http://kudimuk.iblogger.org/95537362138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://penalat.rf.gd/6547031986.pdfIn PDF document text
    • http://fugebuxojawuris.epizy.com/software_issue_tracker_excel_template.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_3a490671c07f4aa4bc1ad79b8c2a6ace.pdf?index=trueIn PDF document text
    • http://moxurux.epizy.com/1859102538.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_eb8141cbe7db443db46b4f5dc689cbd6.pdf?index=trueIn PDF document text
    • http://nalelib.rf.gd/42449294476.pdfIn PDF document text
    • http://tudutov.rf.gd/lights_out_2016_diana_death.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/mezagulonifor.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/59543634756.pdfIn PDF document text
    • http://pitareri.rf.gd/my_life_after_death_erik_medhus.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_off0000c447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC447 6260 bytes
SHA-256: f7d39ee3a88056d0fdd432c5cdd2c4b1bb4bd46dff2d22cc48817351054b9c4b
font_01_sfnt_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 10488 bytes
SHA-256: 1b8425d115907b0ce0636784e07d3775cbe0ce78f9f590da6f7151c72f3e2146

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