Malicious PDF — malware analysis report

Static analysis result for SHA-256 5282fd4147ff3a60…

MALICIOUS

PDF

87.6 KB Created: 2021-04-08 08:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 785ecd0304b3b89393204b05fb061673 SHA-1: 5428c81454157679031aedd64b4fabd211c4ac8f SHA-256: 5282fd4147ff3a605456d8fcfb9d00a27eb2f64c72e4db09096ed8d637081eac
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 0.9989

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://xezojetit.ru/wix?keyword=bridging+from+daisy+to+brownie+certificate PDF link annotation
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/purela.pdfIn PDF document text
    • https://latuxuxapeja.weebly.com/uploads/1/3/0/7/130739017/gatudovanibemi.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/fotuferobopomowobawojikij0h92.pdfIn PDF document text
    • http://podarokinsta24.online/games_to_improve_listening_skills_for_preschoolersabijr.pdfIn PDF document text
    • http://pe50off.info/actor_vikram_moviel9b1s.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/123musiq_tamil_free_download77ken.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_6066b29ddacb3.pdfIn PDF document text
    • http://raisinslabs.club/79552717307jnhyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_603271f907fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fcf186f30a82.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/buenos_dias_mi_princesa_bella_te_amo.pdfIn PDF document text
    • http://cleaner360.shop/busobejodixojexewosavadubamphc.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/61682998679.pdfIn PDF document text
    • https://devaropig.weebly.com/uploads/1/3/4/6/134616199/dabesorubalut_tagekonep.pdfIn PDF document text
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/4384172.pdfIn PDF document text
    • http://gaxenop.medianewsonline.com/luwajupazunujurorukevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_6048f2fba9186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_60152d34d2a47.pdfIn PDF document text
    • http://majovevalaji.sportsontheweb.net/how_to_report_an_experiment.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/zimoxav.pdfIn PDF document text
    • http://www.infobarrel.com/Daisy_to_Brownie_Girl_Scout_Bridging_Ceremony#VTwBCWXEhYdeXmSW.99��In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/628015b1-a648-4bf3-ad73-12ead509eaab/pedalazurutofizivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182ec166-13f0-4285-81cf-d2c2e747d108/80887116508.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/african_union_commission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0333b510-3d34-4aae-9951-42e015968603/electronic_circuit_design_simulation_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f342ad65-1f96-448f-8e7c-e6554458aea2/pevev.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 5692 bytes
SHA-256: 3890078276203ccfb9fa0099bc737716efaae9b9bdea24fd8b3e848b133b4d65
font_01_sfnt_off000113fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 10904 bytes
SHA-256: 46bb5202e4731040da8b14a45374092211397de48794b3185713dbadbbb242a0
font_02_sfnt_off00013931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13931 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e