Malicious PDF — malware analysis report

Static analysis result for SHA-256 91de75a5f40676f0…

MALICIOUS

PDF

75.1 KB Created: 2021-04-29 14:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e40eb368fe2f9868cb9e954db2b6f624 SHA-1: c099c139fcbe120c0779ef48923e4daa9f10e4ab SHA-256: 91de75a5f40676f0c4b65425488d5f2d8620c67677bcc9fa66fa22eae7f4c41a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external URIs, with one specifically pointing to a URL that appears to be a lure for 'Bissell spot cleaner pro manual'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple disposable hosts and link farm heuristics further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=bissell+spot+cleaner+pro+manual PDF link annotation
    • http://dress-russia.ru/rikevetifijdj38i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_604d97a14c7a9.pdfIn PDF document text
    • http://leftoutclub.com/gusokadupebawasapaniga81p1o.pdfIn PDF document text
    • http://axacheat4.xyz/ibm_spss_amos_free_crack1s6tn.pdfIn PDF document text
    • http://getsol.xyz/irobot_roomba_980_robot_vacuum_reviewmcbno.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/558311.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/webarijima_vewodekiroluz_jomijepenogopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485591/normal_5ffcb20cbd14e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5ff0f350bd85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_604728a410374.pdfIn PDF document text
    • http://acgmgroup.ru/wordpress_themes_free_download_responsive_with_slider_ecommercexttpk.pdfIn PDF document text
    • https://donumidivapog.weebly.com/uploads/1/3/4/7/134734387/ca50676c009c.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/maharashtra_ssc_board_syllabus_10th_2019-_20x46vr.pdfIn PDF document text
    • http://operationhomeplate.com/27315880939q8j9j.pdfIn PDF document text
    • http://ratamaperekeja.22web.org/uk_time_in_24_hour_format_now.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/691214be-7261-4dc7-8bd1-fb9f206afe2c/zizofedagivudiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2441714-601f-43d6-8fe3-22e099ed26f3/bmw_x3_service_schedule.pdfIn PDF document text
    • http://meduzifovum.epizy.com/medication_dictionary_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae7b6ab-f4e1-4c90-8ee1-ea03ef59235b/bioflix_activity_cellular_respiration_and_photosynthesis_energy_flow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec78e4db-c949-4b68-ae22-268096935638/21119220214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d18690-74e9-4295-838c-40e1e4e7a5e6/zuguzutugon.pdfIn PDF document text
    • http://pineduvo.rf.gd/agenda_sample_template.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_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 5128 bytes
SHA-256: f14d55236a88333126b7ba73e8ab642655077d5f2af08bbeca40304ab62e831b
font_01_sfnt_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 11112 bytes
SHA-256: 8450440a1d0fc4aef3b5148f47c119690e6bf29d2f9c537853a041d128c42ac4

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