Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f17cdb8c017545d…

MALICIOUS

PDF

73.6 KB Created: 2021-04-14 15:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 73c122e67f35684c83c79f98d47d8949 SHA-1: 9d0a42f7369e3643ffeee990e36085f8b40e7c56 SHA-256: 5f17cdb8c017545d99067ade1d43f1504fed4688feaa9be9bf95e270fc2d8d5f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://mezovuduw.ru/strik?utm_term=definition+of+information+system+in+computer+terms', is directly associated with the document's apparent theme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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 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://mezovuduw.ru/strik?utm_term=definition+of+information+system+in+computer+terms PDF link annotation
    • https://reralifinopu.weebly.com/uploads/1/3/4/0/134018386/tujonurexadodoxenub.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/4192654.pdfIn PDF document text
    • http://reweder.site/719722772019rn3d.pdfIn PDF document text
    • https://latezuletarok.weebly.com/uploads/1/3/5/2/135298634/tosevoxuvokakuriw.pdfIn PDF document text
    • http://zoompol.xyz/17508875182ri3b1.pdfIn PDF document text
    • https://walamezer.weebly.com/uploads/1/3/0/7/130740591/b94591.pdfIn PDF document text
    • https://rimivitelur.weebly.com/uploads/1/3/0/7/130739194/8e3519dee0.pdfIn PDF document text
    • https://fisenekapiwu.weebly.com/uploads/1/3/1/4/131437930/rarej_xopaxazo_jaxubifalumiju.pdfIn PDF document text
    • https://biresunidulili.weebly.com/uploads/1/3/1/8/131856549/6264743.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/1682969.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/xuvamuba/fajozugisaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46e1fc9-7015-4b1f-ae45-088a21afef0b/25289082275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc17306b-06f8-4c44-8536-6a6c33926499/duwuteminotenufebogir.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/that_hideous_strength_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/mailchimp_templates_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7b3e0e-12d5-4714-b090-45722eef1eb7/ue_boom_2_waterproof_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/76186361299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afa6eaa-0613-43bf-b35a-1c97ccbe152c/les_miserables_soundtrack_album.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cambridge_ielts_2_listening_test_4_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fd73ca-f5a5-4468-aca6-40a9681a7530/what_is_my_leadership_style_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/ldpe_sheet_manufacturing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/gagagotukosexakuderavogeg.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_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5232 bytes
SHA-256: 82479a31f59d2046e6e70167d5d9a1d48ff5f7edd0e74d549f6a51efd42511ea
font_01_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 10464 bytes
SHA-256: e69c9709145cbc46e21d9e77f28f06f8b9322bde4b51fb5a221be2700d7e00c7

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