Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5949f140a07ff3…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 04:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 791f3b40225f5de69e7961a7c610e906 SHA-1: 90b225ed56474218bd16f83e2fbb03decf6a5957 SHA-256: 3d5949f140a07ff351528c84dc14d9d3cdf934a44da45b6017368cd04376d96f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=td+jakes+books+2020 PDF link annotation
    • https://fotunerabo.weebly.com/uploads/1/3/4/0/134042859/37d0bb3.pdfIn PDF document text
    • https://wumupokurura.weebly.com/uploads/1/3/0/7/130776197/jetusajun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_600feeecd3517.pdfIn PDF document text
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/robojodatejuma.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/2963252.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/wexunesobonifarazasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_6044f829f156d.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/wurivuve/a._c._a_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/whatsapp_web_chat_template.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/losing_my_mind_sondheim_sheet_music.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_cf0285febe544320af10cd199c6c2d94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/45121106168.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_f436834902694ca685570bc8f2160eca.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_fa61786299be4ee5a697993998503e7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegozegi/49713600126.pdfIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_2edac0cc59954ec6a746419ba26a3f2a.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_4aa6106637c34d29b1d4fc57bd679aa0.pdf?index=trueIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_7175708da4fe48bfbcb2df2d5d04283b.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_8876ef1345ad4d83a022240f71f2f8e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovigebi/americo_castro_el_pensamiento_de_cervantes.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/xuwoped.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_4c4ed7e9a79c46f38ddfe1f5f1532626.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/atto_tag_bangla_full_movie_hd.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_573ffb0a43134c07abd9c3cb54f7978f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/pagexisurizemugagira.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_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 5196 bytes
SHA-256: f9acdb42f12f8d67855585eb4dcdf253de13b232a50706d4797ab53cea90cfcd
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 12060 bytes
SHA-256: 3cb0ffce413252a000ee860e9b64ccb25fb29a72d748fac4ac0fbc6213f187a2

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