Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2758e718661fea4…

MALICIOUS

PDF

77.1 KB Created: 2021-03-11 22:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a3df0b530f98618fa36a097c26a24526 SHA-1: 8bcce34bd6dae053462fa1de28a76becd3fab1fb SHA-256: c2758e718661fea4af9acc2c80765e286f7b36c0f88adb9665f84b36cc4898ff
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The primary malicious URL identified is https://mezovuduw.ru/strik, which is likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+are+living+organisms+classified+into+different+kingdoms PDF link annotation
    • http://erogan24.website/glass_sword_cinema_west_plains_mo_pricesjcnqt.pdfIn PDF document text
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/9916030.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/musculo_agonista_antagonista_y_sinergista.pdfIn PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/83e6770ea59ac.pdfIn PDF document text
    • http://takilajonireko.22web.org/lajeti.pdfIn PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/2747625.pdfIn PDF document text
    • http://profmaster74.ru/how_do_i_access_my_seagate_goflex_home1ep5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_0d59db72fd344cc4af79e45ae887e64d.pdf?index=trueIn PDF document text
    • http://muzizax.rf.gd/20558719619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2871cea-0749-4919-9b9a-d522b28e33ef/97207922.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_2681dc2e99a64fbf805a9a65c1f8eb67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f209291-190b-480f-ae17-b95eb4c0fd23/wikigofezitoridasusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9030aa3e-0f69-4f2e-afc6-a2d55ee37b79/38835693390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe6d168-b4ba-4fe4-b797-8c2e4cf5fdd5/what_is_cloud_service_model.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/valkyria_chronicles_ps4_guide.pdfIn PDF document text
    • http://wujukigow.rf.gd/26611053534.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/1275498164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526bc180-1499-41b9-9809-11c6fd6fc20b/bebirolezimuvujekoweseru.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_31fbd063fde7447eb42a99bdacb16dbb.pdf?index=trueIn PDF document text
    • http://sibedegaxuwo.rf.gd/42986076304.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_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5520 bytes
SHA-256: e154076e2cc4e53bac94cb84484cf6571637a8719e5b764eb83899c62a060191
font_01_sfnt_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 10372 bytes
SHA-256: 6a98c268e335e98798a115dc8d5e0830fdf7c8bf6847765d8577bd36ee0ba60d

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