Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44e86f6c16a12e0…

MALICIOUS

PDF

115.1 KB Created: 2021-02-18 02:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 35378c234486b31b3a9f714f3a60c1b5 SHA-1: bb143ac2fd890959e3bae0674afb00b10a49c869 SHA-256: d44e86f6c16a12e0c4903c6b810bf52fe8711343c1d101626dd051dcc6609b65
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. ClamAV detection as Pdf.Phishing.Trojan indicates a malicious intent, likely to phish users or deliver further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users.

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 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.
  • 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://leonvi.ru/123?utm_term=which+microphone+has+the+best+frequency+response PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490974/normal_5ff0696f3aa29.pdfIn PDF document text
    • http://puliliraforuwu.22web.org/mosimiluditurakodin.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/1379176.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/fegufizuzulinol.pdfIn PDF document text
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/d829a682.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/jadekudapokan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fd6d2c49bfd0.pdfIn PDF document text
    • https://forilulan.weebly.com/uploads/1/3/1/4/131408022/9235379.pdfIn PDF document text
    • https://bomazadoxu.weebly.com/uploads/1/3/4/4/134474586/3922884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilovin.epizy.com/dojigitu.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/demon_hunter_dps_guide_icy_veins.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/cast_away_full_movie_in_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/rasemivoriwudixeda.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/jiluxazek.pdfIn PDF document text
    • http://sejigesenevemi.epizy.com/information_technology_report_to_board_of_directors.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/hide_notification_icon_app_android.pdfIn PDF document text
    • http://mijugavagi.epizy.com/85971087859.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_off000183a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183A0 5604 bytes
SHA-256: 99f46503b87ca949de0f7bd59323bc20b4667f94b6ec82fed25ac307304f1cb7
font_01_sfnt_off00019697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19697 11852 bytes
SHA-256: ff2996ec9f0882effcf95ddbcb34523bd3dfad4126e2a92842ba2eea37923b9d

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