Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06186d37a2dc2b7…

MALICIOUS

PDF

71.4 KB Created: 2021-03-11 08:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 64e6d79c9123461447dc59c3201d5d9b SHA-1: 233e5fa9dad78e67a745977a4ef1cc5ab411d2de SHA-256: e06186d37a2dc2b7e247fa2844a61beb1435cc8369c480f1a72c0d97a42b4add
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/123?utm_term=guidecraft+see+and+store+dress+up+center PDF link annotation
    • https://cdn.sqhk.co/sesijisova/bgfifjj/sodunilojafonak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_603f3bca69993.pdfIn PDF document text
    • http://sosed.market/8826614851680ogt.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/kojebojafi.pdfIn PDF document text
    • http://madewithsunshine.com/78199768063lxngu.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/wozowatafisek.pdfIn PDF document text
    • http://igonlinesupport.com/what_is_the_best_phone_system_for_a_small_business7gv3m.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/zepagawago.pdfIn PDF document text
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/pavitowikuvage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_601be214cd077.pdfIn PDF document text
    • http://chebsvet.ru/word_academic_calendar_template_2019-_208j82t.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/play_school_drawing_book.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/jjOrigg/realm_grinder_r16_research_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mubutuve/hahb0tP/rotten_tomatoes_netflix_comedy_series.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/small_rainbow_fish_species.pdfIn PDF document text
    • http://7gusevshop.website/713794345255zscx.pdfIn PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/9071609.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bizifesa.rf.gd/chi_health_lakeside_billing.pdfIn PDF document text
    • http://sumojoripira.rf.gd/xafemiromevobaxaxajek.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_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 5148 bytes
SHA-256: 69597596950d4a5ebaf6906e10fbf5482ca6e776d821577c10e741a6df3e286f
font_01_sfnt_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 11472 bytes
SHA-256: a4c8d6179404a9654e66466636d1941384a09594e731471477934f1385125b17

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