Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0796d7e37ec55a…

MALICIOUS

PDF

79.1 KB Created: 2021-05-31 01:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a579d50ad3050d74d0e4d30e6a7fb3cc SHA-1: 209c35d79a7f40c4ad421016967ce34a4b8417d7 SHA-256: ce0796d7e37ec55a44563ae375b9f55532e843e33dbca6558a8be8b1cd930186
186 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, many of which point to disposable hosting services and are designed to redirect users to potentially malicious sites. The primary URL, 'https://midufefew.ru/strik?utm_term=where+are+prostitutes+in+gta+v+online+locations', suggests a lure related to adult content to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=where+are+prostitutes+in+gta+v+online+locations PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375907/normal_605c347b3c438.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/9448223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fda876421348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_605c969f6dde2.pdfIn PDF document text
    • https://mevenuma.weebly.com/uploads/1/3/4/3/134380719/8398351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fd0a3f2b4a46.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/eaccc08fbcd.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/8321923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff9dc4ac1025.pdfIn PDF document text
    • https://xubebedi.weebly.com/uploads/1/3/0/7/130776367/guvuwakirizid.pdfIn PDF document text
    • https://garugufalavul.weebly.com/uploads/1/3/4/5/134507034/899d51bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_60105e2a27637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417670/normal_6047cf047cfc3.pdfIn PDF document text
    • https://tixiteto.weebly.com/uploads/1/3/5/2/135295688/4302921.pdfIn PDF document text
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/3940490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb1ae7-8914-4f44-b43d-ddfb3c33f98d/2014_dodge_ram_1500_transmission_shifting_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce25c1b4-b6e5-4cba-a4e5-65af3f0cad83/libro_de_fisica_1_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb12b2c-7e5e-4788-ad52-29e725d4ffc6/60193572110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c3bd1c-a3f7-4521-93fd-ea2abdef5357/mazubomowakugoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc948dfb-8c33-40a5-8c7c-50d17817149b/11124039788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2ad3a6-91d7-4000-adfe-da97eb56155d/tifijivaferelel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd132568-24ee-427b-8cd2-c0dc3efbcfe6/rigagonepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927505cf-30cb-4221-9e81-63d05f464853/how_to_become_a_secret_agent_in_philippines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 5268 bytes
SHA-256: e10f0304b288fccc4315195f726ab8882ff4bbdb1059380cff59b2c77e69bf73
font_01_sfnt_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000109a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A6 10692 bytes
SHA-256: fb4bef9ac15091f0c64d5fed58e6099c26c3b46810316393c32bbd58ee5ff16b

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