Malicious PDF — malware analysis report

Static analysis result for SHA-256 d087a25df901586d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 12:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e2e5ee7facfd7643749db5bbd6e77f SHA-1: 53ea7f1970333f95e89bcaa61ea1af6da9605f48 SHA-256: d087a25df901586d5977cf3443a2928b9433f0ca267bea185b88eee2517532a7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://jacksth.ru/wix?keyword=maytag+atlantis+washer+not+spinning+clothes+dry', suggesting a lure related to appliance repair searches. The presence of a large number of generated SEO links and the ML classifier's high confidence score indicate a malicious intent, likely to drive traffic to malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=maytag+atlantis+washer+not+spinning+clothes+dry
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/4181855bf3b9f68.pdf
    • https://cdn.sqhk.co/vopupevomate/mnH8iek/color_ropes_2.pdf
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fdec7a2257af.pdf
    • https://funosojo.weebly.com/uploads/1/3/5/3/135336125/67756.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_603c2bb42ed78.pdf
    • https://static.s123-cdn-static.com/uploads/4401519/normal_6007a01fb269e.pdf
    • https://cdn-cms.f-static.net/uploads/4369794/normal_600e03ad9c302.pdf
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6015ff2b9e995.pdf
    • https://nugazemagutum.weebly.com/uploads/1/3/4/3/134346004/496b0121a.pdf
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fd6a791bbdf1.pdf
    • https://butoxuxesadi.weebly.com/uploads/1/3/4/6/134699311/tepinirokujaj.pdf
    • https://cdn.sqhk.co/muxigatatini/jeMq6hh/bimivuworibub.pdf
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/4806493.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_6e8e153db6c1495fab3708a89df3c4eb.pdf?index=true
    • https://s3.amazonaws.com/tejuvonixag/55771945531.pdf
    • https://s3.amazonaws.com/sevoga/risapu.pdf
    • https://s3.amazonaws.com/bagisi/ashoka_university_form_2018.pdf
    • https://s3.amazonaws.com/woxorojero/gantt_chart_excel_template_for_project_management.pdf
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_80c306217f5f47a9b73a115ab938fa13.pdf?index=true
    • https://s3.amazonaws.com/bogijexu/20855173920.pdf
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_7cc14ec40cc64261acb9a8f09f3a89ab.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe1.bin
4cb921557e43dd8c980d03ff1396fb923814f9fa42845628bcc18b71d4879895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5532 bytes
font_01_sfnt_off0000fecf.bin
ba1b2edfb86e8a0543802116afb3afe21126f7058ee10e2c97ad977b1c34fe23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 11540 bytes

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