Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede62aac48e973e1…

MALICIOUS

PDF

83.4 KB Created: 2021-03-26 18:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a79f0d7f4b5c6c7a437867dcc05e7bd1 SHA-1: 5b800af52c56b76973e14ace7b777ee17980fc50 SHA-256: ede62aac48e973e1d570f993efc850c2048e2a86f3e99ba93d1ca901bd5fb993
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 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://dugedepap.ru/strik?utm_term=youtube+how+to+use+microlife+blood+pressure+monitor PDF link annotation
    • http://kubewozija.iblogger.org/vovusulimolevopidusiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_605d7b19826c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fe12d9dce3c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b147e6d6-2bee-49fd-8962-b1e3a99f331d/super_mario_land_3ds_cartridge.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_d13ddc7d73854d1192ae40f085953029.pdf?index=trueIn PDF document text
    • http://jefevuxivux.epizy.com/bavabuxubebirufitovo.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_0bae269169104ca8bb51e207c022b45e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/79623322681.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c33f868172ed4853b4ad2c765a1e6733.pdf?index=trueIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_3404576834794769a1bd133a8af43a9e.pdf?index=trueIn PDF document text
    • http://lijaros.rf.gd/20248837927.pdfIn PDF document text
    • http://vaxasevon.epizy.com/action_verbs_for_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/podurorobobupune.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_6b0eecffabbd4a4abead142900246390.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_29f9c23780794ef98123932bec27775f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/bahishti_gohar_urdu_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9630dde-df5d-4377-9e56-379313b9c147/edenpure_heater_ratings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4be9be-71ad-47bc-a18e-4c9aebfa31a1/ejemplos_de_dialogos_en_ingles_entre_dos_personas.pdfIn PDF document text
    • https://adea4596-07c4-4c45-ba97-107779ed6dc5.filesusr.com/ugd/5bd9e2_9d7ae34635e14502b552bb3bb10db930.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/gujuzogofep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897d7729-c7cc-4f22-9810-a079a09d203e/seruj.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_485895a1dd474164947d0704d1bcd6d4.pdf?index=trueIn PDF document text
    • http://gunubepixel.epizy.com/how_to_check_continuity_with_a_fluke_meter.pdfIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_21299e8edaf548d98595ae0e63390ae5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 5260 bytes
SHA-256: c7a2968b2f6ddb4d479ca0be9f3f4ca451e0208ea37ad381c93ee8d4241be162
font_01_sfnt_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 10800 bytes
SHA-256: d618f91e1ee1be733b0c196748c9851b42efb8d72081f0e89bb21660cf379052
font_02_sfnt_off000131b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333