Malicious PDF — malware analysis report

Static analysis result for SHA-256 786ed697c1a55fe4…

MALICIOUS

PDF

71.5 KB Created: 2021-01-23 09:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3660329e637c6b971f35a54fe9ae75d0 SHA-1: 708bf85698c56181176ca2aa328a5b824562ffd3 SHA-256: 786ed697c1a55fe4edb1327042fc633030b8943c7633f944a931011621f61f17
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable or unknown hosting services, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm heuristic further supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://trafftec.ru/123?utm_term=free+sms+spy+apk PDF link annotation
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/jafab.pdfIn PDF document text
    • http://mebesovinu.22web.org/95335103969.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/16510626016.pdfIn PDF document text
    • https://kijaxupujik.weebly.com/uploads/1/3/2/6/132695195/8297d0af.pdfIn PDF document text
    • https://site-1222001.mozfiles.com/files/1222001/bubblegum_troll_candy_crush_friends.pdfIn PDF document text
    • https://site-1174981.mozfiles.com/files/1174981/sniper_traffic_hunter_mod_apk.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/76b277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banugigo.epizy.com/asisa_telefono_informacion_91.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/listview_custom_arrayadapter_example_android.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/adjectives_activities_for_beginners.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/84027106092.pdfIn PDF document text
    • http://dofumuligo.rf.gd/fomadoridovapuruxig.pdfIn PDF document text
    • http://wetoxikilosawa.epizy.com/gakufuzowowowobudu.pdfIn PDF document text
    • http://zaramapowo.rf.gd/animation_maker_apk_for_android.pdfIn PDF document text
    • http://loxosufodu.epizy.com/psd_to_high_quality.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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 5052 bytes
SHA-256: 04082dc6ea1c6181c4328bffad5c4ab3dffe5bd3eeb8b69a9892679088cd1eac
font_01_sfnt_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 10496 bytes
SHA-256: c256c74bc5ed957534a62f13ba9daa18836b9df751f416dd00d7a00a7389e551

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