Malicious PDF — malware analysis report

Static analysis result for SHA-256 9853d2b8598bef02…

MALICIOUS

PDF

75.1 KB Created: 2021-02-07 15:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d2370465a41971f829a23818e864ee1 SHA-1: 5d7a975bd32ff88bc7f2c9235a1df3a84662441a SHA-256: 9853d2b8598bef023d7a349c914e0093ffca1232085f151147f7566595721db4
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a prominent one to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wb?keyword=criminal%20case%20apk%20pc%20indir PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381740/normal_601a531463c71.pdfIn PDF document text
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/telew.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/mufafotokepa-gidutupadeb-fasisadika.pdfIn PDF document text
    • http://subbellassecret.com/pawatitumakonugosub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_601d2a975ef4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5fe0b50d7db41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425492/normal_6000888d5e434.pdfIn PDF document text
    • http://natlab.ru/19566419037x61f5.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/6977960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_5fd3744d107db.pdfIn PDF document text
    • http://tumbochka.space/android_auto_apk_4._5._59sexte.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_5ff49d8441b6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382197/normal_5ff4c27587700.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/dewutexorob/hierarchical_linear_modeling_guide_and_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/goxanigakikox.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/milizadipitanafulidobur.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/wazuru.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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5188 bytes
SHA-256: 5d5e06ea2ea6e9be53a7a1f913356ecf406a63de016f796e94406f119c6b8125
font_01_sfnt_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 10700 bytes
SHA-256: a4d7d915774cc7f4e9500fb92768321db78b08461c21f215e3315b9fb75a0766

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