Malicious PDF — malware analysis report

Static analysis result for SHA-256 9985ebf5a71355bc…

MALICIOUS

PDF

86.3 KB Created: 2021-02-25 13:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 959dcba13d4fcdee13360c363d868200 SHA-1: 39cf7febe82c24581b0bd494daf14a91aceec8d6 SHA-256: 9985ebf5a71355bc7303c610dfbba1414a85b95c19703ed112953e3d4d73c9eb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many of which are generated SEO-style links, suggesting a link farm or phishing campaign. The primary URL, 'https://jacksth.ru/wix?keyword=glencoe+automotive+excellence+volume+1+answers', is likely used to direct users to malicious content under the guise of providing answers to a specific document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jacksth.ru/wix?keyword=glencoe+automotive+excellence+volume+1+answers PDF link annotation
    • https://cdn.sqhk.co/jiloduvunilu/oWSjcfk/receita_glace_simples_para_confeitar_bolo.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/A3hdDjf/bekakovulebemigurek.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/how_to_embed_base64_image_in_html_email.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/wiKAia2/huey_lewis_wife_sidney_conroy.pdfIn PDF document text
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/6100701.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/XhjDoWW/most_viral_hashtags_for_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/iiggiie/takeout_restaurants_near_me_drive_thru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafutalamisa.rf.gd/how_to_record_video_on_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/65425081819.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/yaber_native_1080p_projector_5000_lumens_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/sezedipewawavizofunaba.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/charlton_primary_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/informatie_despre_imperiul_roman_de_rasarit.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/donasupopavek.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/bseb_matric_marksheet_2019.pdfIn PDF document text
    • http://mibaruruluket.rf.gd/74732293133.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_off00011593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11593 5248 bytes
SHA-256: bc5b353678375124c774e5c9ac83b5d2f06ccf5d2143e64ca5f13e8ed348119c
font_01_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 10720 bytes
SHA-256: 882cabc408f6ab050a62e1af10a84bcdf106fde020a90d9e2388aa826e1ca9be

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