Malicious PDF — malware analysis report

Static analysis result for SHA-256 e415779c172a5f7a…

MALICIOUS

PDF

84.7 KB Created: 2021-05-24 18:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 549a6e8b5e2529c806082c10ac1614a1 SHA-1: 7dbca459029f2afcb5bbaa74c549357eacfc1e56 SHA-256: e415779c172a5f7a16feaac3fcbcd6755edea282d68af3aeb0dad567846f4e05
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users through a deceptive link farm.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=human+skin+color+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369660/normal_604908d9a52d5.pdfIn PDF document text
    • https://topukutenikoxi.weebly.com/uploads/1/3/4/6/134668920/2959342.pdfIn PDF document text
    • https://buzotifosu.weebly.com/uploads/1/3/2/6/132695554/2379280.pdfIn PDF document text
    • https://dugemitisij.weebly.com/uploads/1/3/1/4/131409309/b47fa653071eb4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_6021c24ee1dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_600f8f6e73193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_604f339ccf82d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_5fdb67f39551a.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/1415360.pdfIn PDF document text
    • https://fojokelimavame.weebly.com/uploads/1/3/4/7/134713907/meluvijiriwixusofeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_6048cf0d71ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_600da4a9c1f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473638/normal_604df40e8252e.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/pivetuzadujo/1507732475.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/takinutelaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4241b941-3fff-430d-a122-01ef2f57534a/nujobem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0510c22-2445-4aa5-a356-30463c7f369f/62728585441.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/dofanupabokekumenuretapob.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/gizuxosudilaxazege.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_off00010e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 5112 bytes
SHA-256: eafd82e66487eec756cc4b94c51a8eab5f74fbb61629e9ac7182381f5a9ab677
font_01_sfnt_off00011fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 11232 bytes
SHA-256: c6f834710e45e2d9d58c90d3cef46f877ad9e8c6dd675c4ce2a0db764715c568

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