Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a4b309390f5e9c…

MALICIOUS

PDF

70.3 KB Created: 2021-01-12 10:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5fc980e615424ccd3eff4483b3080f8 SHA-1: c383a7fc102c7e5520d2f76fee030be8f53b3b44 SHA-256: 63a4b309390f5e9c1ae0412c3cf3f582da496b41787dc184d7f52b7c34b3fcef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are part of a link farm designed to improve search engine rankings, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffnew.ru/123?utm_term=texas+commercial+real+estate+sales+contract PDF link annotation
    • https://cdn.sqhk.co/ditetona/gfnjact/ikea_dresser_black_friday.pdfIn PDF document text
    • https://site-1171511.mozfiles.com/files/1171511/ocean_splash_match_3_free_puzzle_games_play.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/3f47f0d.pdfIn PDF document text
    • https://kuvitoguke.weebly.com/uploads/1/3/0/8/130813837/4000346.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/MheiWlJ/extreme_car_driving_simulator_2015.pdfIn PDF document text
    • https://site-1176021.mozfiles.com/files/1176021/best_website_templates_html.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/jhcjiVS/2596554527.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/febopa/android_customtabs_dependency.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/gesto_da_tecnologia_da_informao_curso.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/jegarixuxutelubov.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/77112247720.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/45652339221.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/fable_2_bower_lake_demon_door_guide.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_off0000d865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 4960 bytes
SHA-256: 1717297081ac45cc0744973449018bada337d3ac135d8960a9287602c2e02f51
font_01_sfnt_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 10144 bytes
SHA-256: 99e07e577cfe28b7e3b84828989b24fcc095a1942292a7915f814801e5c5a1b0

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