Malicious PDF — malware analysis report

Static analysis result for SHA-256 4954598d272e8807…

MALICIOUS

PDF

73.9 KB Created: 2021-01-17 14:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ea7fab1bcb0162ea22ec2929fcc45a18 SHA-1: eb97a4f41c109fa06f32ff6863fcff7655eb7068 SHA-256: 4954598d272e88073dbf56b868785e7a4f56e6002ac0ad58118af7aa5ba86aa5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to potentially harmful websites for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=barred+owl+sound In PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/6220383.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/7iahfwu/cross_the_bridge_when_we_get_to_it.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hghc1ji/zombie_survival_guide_movie.pdfIn PDF document text
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/kasarekapinip.pdfIn PDF document text
    • https://site-1179507.mozfiles.com/files/1179507/cartoon_ringtones_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/C6jj4id/jubilarifuwenej.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/abhcSX4/polodenogesulemoti.pdfIn PDF document text
    • https://cdn.sqhk.co/sijoputolu/ShhM6O6/36940042455.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/jfjgv9H/travian_kingdoms_wiki_tr.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/xiroxoxolaga-jeseranelimaw-zudaliwuruxow.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/VjjHhiq/amazon_kindle_reader_cloud.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/giTqy5H/sadojaligamepilugadag.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/fjfjc4q/lufigofani.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/sezutuma/69820093315.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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 4960 bytes
SHA-256: 3c18ea4e45b33addb33ac71f59ad7a2f1af9f97c501d63667f6802eae223cf25
font_01_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 10924 bytes
SHA-256: 0ddcfd3c37090edb78d53b61ed0dbd80ff5902806470ad452670a2fc703e08f8

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