Malicious PDF — malware analysis report

Static analysis result for SHA-256 60327940b9d16c33…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 18:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17b913ab0e0f911fab1ca68f21fd741c SHA-1: e957d7387e7ca25072d31a1e838822e7e1ecb68c SHA-256: 60327940b9d16c336e193982e413c149d6187b3984e99c3fe91239368baa3fd7
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 0.9993

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://jumiwimov.ru/strik?utm_term=elementary+geometry+for+college+students+7th+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366389/normal_600955e3a9018.pdfIn PDF document text
    • http://neuroncraft.online/lebinowadagibetefusojg3la6.pdfIn PDF document text
    • http://eurofamily.pro/35204576822ony64.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/gejiMjf/78091886059.pdfIn PDF document text
    • http://stassikorskyi.com/152448542032dmvg.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/ifjijdA/fuforokufojudusajitugup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fe196d4ca150.pdfIn PDF document text
    • http://shopsupergood.site/81310844284guvn0.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/chcmyjf/lajafiten.pdfIn PDF document text
    • https://cdn.sqhk.co/zafilivopupu/jfZjeq3/livapefugolodiseraveb.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/liwafo/windows_adobe_reader_scan_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a5a28c-0563-4f14-85d3-ab1d6df3933e/vatizumuriruve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a07d396-0238-4712-9ee3-d33715077a15/how_do_you_start_a_sports_club.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_9545bf13a62d46ae92228435958460de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/fegirefebogale.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_a0f34dd116ab4b7c9517524471d036b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/bioclimatic_design.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_7c37318375834758a0002096f073f4a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/sudotapedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741752eb-6d20-46c9-bac2-114030f9715c/what_can_i_do_with_an_associates_degree_in_information_technology.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_ecaae25640fc4d249494810b5816523e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/jubivosopotimek.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_eae10bffd7e44a3393e182abc31ff255.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb54b77-d77e-4fda-9b60-08d96033bb1a/36926799641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb8dad5-6c10-4bbb-b743-553c1cfc5e2d/30786711541.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_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 5576 bytes
SHA-256: 5a88bc1ee2b1769b930adf31dc36f49a2c69ed50b36a425f963e593d8416d79b
font_01_sfnt_off00011374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 10912 bytes
SHA-256: 297aad2372bb736c22a12f44cc6578305a08f858c2fb7a3a2817b4c5ff57ffb4