Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5cded466e17234…

MALICIOUS

PDF

76.4 KB Created: 2021-04-09 18:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a863df7937282e78fc943d7619969438 SHA-1: 2bd2c4ccd8cbe71031f3b36981166a1ee49b6b18 SHA-256: 1e5cded466e17234866d0bb6f0f9a3c046bb6f84370aac9e661e07e55f3a83e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs point to suspicious domains, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lozipotod.ru/strik?utm_term=how+long+are+first+alert+fire+extinguishers+good+for PDF link annotation
    • http://xunarepozufuz.mygamesonline.org/formative_and_summative_assessment_in_the_classroom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_601d69b1c4bdf.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/65887685082.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/lowajir.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/92260373190.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/91611696503.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/how_to_change_wifi_on_liftmaster_myq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_603eb2942aa81.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/5054928439.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/doluwasuboxojigu.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/pobusinebovepekeru.pdfIn PDF document text
    • https://waneratamif.weebly.com/uploads/1/3/1/4/131436972/sefos_pedogusajotosad_kukofapuzoba.pdfIn PDF document text
    • https://nesaresivegixan.weebly.com/uploads/1/3/1/4/131453215/pamomazarawudivo.pdfIn PDF document text
    • https://naxaletuzo.weebly.com/uploads/1/3/4/5/134508506/xolujawovad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60383a2fe806a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494661/normal_6018ccdf67e66.pdfIn 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/4eefa74e-ca2b-46ad-af0b-ca43d6b084d1/emersons_nature_purpose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486dda23-285e-4f34-9431-9b81f195f6a7/xilezogeduxodixodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b82c5c-bd06-408c-bd82-205c376aac93/93869032668.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/76488242090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbff2182-c9ce-49dc-bd28-31b7e5129f28/34739544877.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/3rd_grade_common_core_math_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/brother_pt-d200_power_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/biology_mcq_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10b526a-1874-4a34-8c4c-81670647d75a/19728760427.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/73859863847.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_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 5292 bytes
SHA-256: 80ae7a76f1b6b3ee14a8f6721fefde02fb21e561857d6bfb7884354c1ae92e83
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 10656 bytes
SHA-256: e1f95a847da13283f5bd881b1f564a051d8adb9152d00827ae8f9d3adeb9778b