Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de5277696fe88f9…

MALICIOUS

PDF

67.1 KB Created: 2021-02-23 05:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: faf4536d9ed81351a36142e832db4a5c SHA-1: cc918139681993c9646919484b7b2b5f90839821 SHA-256: 3de5277696fe88f99b703fb545dbe52cc1580749efbac3af577cdc5021fbfbb5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest the document is designed to redirect users to malicious sites for further exploitation.

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://jacksth.ru/wix?keyword=central+commercial+high+school+nyc PDF link annotation
    • http://hightrade.club/bufajutinoroxesijubio4k2x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411701/normal_5ffb16809fc85.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/939429957846wmhs.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/jodusorulodigoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62c29da25e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450041/normal_5ff027cd74ac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5fdb5ad945db4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_60011e8767b4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5ff94c0ec8e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_5fe115785aa5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_5fdc769539bae.pdfIn PDF document text
    • http://profyhouse.ru/96964082794l2h18.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/7898345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_600d25d6c6036.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/loneminovu/14720234172.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/xomafogefusud.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/fusiform_aneurysm_aorta_ct.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/kediboxabaxurotu.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_off0000c820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC820 5220 bytes
SHA-256: 15aa014cd64cfcb37055e4550330c8239d9b9d9d6cb21dd545fa828b64ca2913
font_01_sfnt_off0000d9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BE 10964 bytes
SHA-256: 63faedd49f55e7a33671059682a0174c9e7870bf33691012220dd1f692e8275d

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