Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d87f02faf6e1139…

MALICIOUS

PDF

94.9 KB Created: 2021-02-18 05:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8a82ef24f49f46a086030c01c33ef63e SHA-1: 2673ab5395da33994af571d010e4c427c5ad2286 SHA-256: 4d87f02faf6e113986977491edf1dd22a058904de29d75c22a1f5024145fb189
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL mimics a search result for a philosophical PDF, likely to deceive users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://bologen.ru/aws?utm_term=what+is+ethics+in+philosophy+pdf PDF link annotation
    • http://ufenmac.com/vexixuvezilunepavasavuk3gzxm.pdfIn PDF document text
    • http://uchebnoe.website/xowixinuwedotabepsptys.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/6162a7bfed.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/4bhahjn/fususugasetitan.pdfIn PDF document text
    • http://hhizmet.com/cuantos_mililitros_son_30_gramos_de_aceitej3tkw.pdfIn PDF document text
    • https://rosokejasos.weebly.com/uploads/1/3/1/8/131871530/e5b333.pdfIn PDF document text
    • https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/77102af0a629c31.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/idwhLgi/ropaminigiguzamu.pdfIn PDF document text
    • http://cashfree.store/denogobowapufanurukcbuwv.pdfIn PDF document text
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/ferepiwapijat-nidoxi-bedujejov.pdfIn PDF document text
    • http://topsale.pro/wizapebimupufonipitixej1yp9m.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/sefiwegegagu/hd_movies_2018_hollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/62966586906.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/97900778569.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/animedroid_apk_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/wibumepekon.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_off00013873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13873 5260 bytes
SHA-256: 9aa077a1133da3ca1afd0dc4cef2e209db4abce1243a289149fab0ce278fa0ea
font_01_sfnt_off00014a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6F 10548 bytes
SHA-256: 842e65967d86af0ff25a079f1629e6026532558ed70758cd7d0df650a820b2ec

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