Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b53ff5c8ac7ca1c…

MALICIOUS

PDF

77.7 KB Created: 2021-02-24 19:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1d5fe2c6acfe13609589aa7a90f95a7d SHA-1: 4ee8ce83e3289391d532358e76a5bdb8b08fe4d9 SHA-256: 6b53ff5c8ac7ca1c99bf7ad719e91cfb6a11f40c682bd161bfa8f60e243284d4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 links. The primary external URI points to 'https://baarspo.ru/strik?utm_term=vista+21ip+user+manual', suggesting a lure related to a user manual. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=vista+21ip+user+manual PDF link annotation
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/jaxisevi_tozefiguwel_gupepitozule.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/gorajep.pdfIn PDF document text
    • http://pochta-24.cc/wajuxiruvavosesebadike6miia.pdfIn PDF document text
    • http://visiblawty.com/domain_and_range_worksheet_3_answersp895w.pdfIn PDF document text
    • http://robot3.site/7068442372go17q.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/google_cloud_security_certification_free.pdfIn PDF document text
    • http://jilet1.club/cities_skylines_parking_garagen5tdq.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/jepasixamabibalezakudob.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/terry_pratchett_wyrd_sisters_movie.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/likadojivivofu/zowuro.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/subefumoviw.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/92214833461.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/dark_souls_3_save_file_download_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/54903069701.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/d_d_adventure_league_logsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/correctional_officer_interview_questions_and_answers_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/guide_critiquing_photographs.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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5116 bytes
SHA-256: fa418c9b379fdac5a655a22b3fbf13c949e3855993db0533e4e5f16eab9a1cc1
font_01_sfnt_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 11040 bytes
SHA-256: 27bd5b40fe4875758df5a993fd3d905fe4905d86dee1d471ed33fc4a8d302a9c

Open this report in the interactive analyzer, or submit your own file for analysis.