Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fab57c20deff4e3…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 10:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b90f6d3819342b396d7019a22a3ecdd6 SHA-1: d0d50b6889b97750d43bea4bea56454b3225abdc SHA-256: 7fab57c20deff4e3c7e3e110e4912e6ce34a9727b65439702f01ef55885f010f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=brevard+county+building+permit+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377706/normal_5ffad675e6cdc.pdfIn PDF document text
    • http://naturwows.space/law_of_conservation_of_mass_lab_reportkoh76.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/free_anime_keroro_sub_indo.pdfIn PDF document text
    • http://premial.su/ray_dalio_principles_chapter_1x1vy5.pdfIn PDF document text
    • http://arfeshome.com/502164561379g6ql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_60251ff294b83.pdfIn PDF document text
    • http://leafester.online/toshiba_satellite_a200_led_error_codesqopm1.pdfIn PDF document text
    • https://gapuropiti.weebly.com/uploads/1/3/2/7/132740804/14500.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/1572504.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/zaxozonubexagem.pdfIn PDF document text
    • http://komarovskii.xyz/best_storytelling_music_videost1xba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fcdd12fc3c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fda1f281a023.pdfIn PDF document text
    • http://blog-millionaire.buzz/276375541351smei.pdfIn PDF document text
    • http://drovazvenigorod.ru/ffxiv_mining_leveling_guide_50-60e7g2a.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/zedudo/43898963933.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/62606964096.pdfIn PDF document text
    • http://segegilomojok.epizy.com/how_to_get_splat_red_hair_dye_out.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/psychology_bernstein_10th_edition.pdfIn PDF document text
    • http://vonikolodu.rf.gd/free_powerpoint_award_template.pdfIn PDF document text
    • http://baruluzibovog.epizy.com/watch_the_trumpet_of_the_swan_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/86479969845.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/lagunivuxuzerebetimipi.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_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 5648 bytes
SHA-256: 09ea7e3e56a23cab6c08d43a628f39888a44d0caa468ca2b64cda1f63cbca536
font_01_sfnt_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 11824 bytes
SHA-256: b8bccf676ea3d5244400262fdaf11b8ec05feaf49a136ff32b98707976448aae

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